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ÇóÖªÕß001: »ØÌûÖö¥ 2013-03-02 13:13:45
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¸Ðл´ó¼ÒÖ§³Ö£¬ÉÏÆÚ»î¶¯Á´½Ó£ºhttp://muchong.com/bbs/viewthread.php?tid=5529056&fpage=1 ÉÏÆÚ»î¶¯½²½â ´Ê»ã½²½â£º 1. lack vt. ȱ·¦; ȱÉÙ Àý¾ä£ºI lack words with which to express my thanks. ÎÒÎÞ·¨ÒÔÑÔÓïÀ´±í´ïÎҵĸм¤Ö®Çé¡£ 2. either adv. (·ñ¶¨¾äÖÐ)Ò² Àý¾ä£ºThe product is of high quality and is not expensive either. ÕâÖÖ²úÆ·ÖÊÁ¿ºÃ¼Û¸ñÒ²²»¹ó¡£ 3. undesirable adj. ÁîÈ˲»¿ìµÄ,²»ÊÜ»¶ÓµÄ;ÌÖÑáµÄ Àý¾ä£ºBig cuts in education are very undesirable. ½ÌÓý¾·ÑµÄ´ó·ù¶ÈÏ÷¼õÊǼ«²»ÊÜ»¶ÓµÄ¡£ 4. outweigh vt. ÔÚÖØÒªÐÔ»ò¼ÛÖµ·½Ã泬¹ý Àý¾ä£ºHer need to save money outweighs her desire to spend it on fun. ËýʡǮµÄÐèÒª±ÈËý»¨Ç®ÓéÀÖµÄÔ¸Íû¸üÖØÒª¡£ 5. survive vi. ÐÒ´æ, »îÏÂÀ´ Àý¾ä£ºThese plants cannot survive in very cold conditions. ÕâЩֲÎïÔÚÑϺ®Öв»ÄÜ´æ»î¡£ 6. eradicate vt. ´Ý»Ù,ÍêÈ«¸ù³ý,ÏûÃð,¶Å¾ø Àý¾ä£ºThe disease has been eradicated from the world. ÕâÖÖ¼²²¡ÒÑÔÚÈ«ÊÀ½çµÃµ½¸ù³ý¡£ 7. dense adj. Ãܼ¯µÄ, ³íÃܵÄ, ŨÃÜµÄ Àý¾ä£ºWe entered a dense forest. ÎÒÃǽøÈëһƬŨÃܵÄÉÁÖ¡£ 8. transport vt. ÔËËÍ; Á÷·Å Àý¾ä£ºA bus transported us from the airport to the city. Ò»Á¾¹«¹²Æû³µ°ÑÎÒÃÇ´Ó·É»ú³¡Ë͵½³ÇÀï¡£ 9. bury vt. ÑÚÂñ, Âñ²Ø Àý¾ä£ºThe old man is burying his money. ÀÏÍ·ÕýÔÚÂñ²ØËûµÄÇ®¡£ 10. graze v. (Èö¯Îï)³Ô²Ý; Å£¡¢ÑòµÈ£¨ÔڲݵØÉÏ£©³ÔÇà²Ý Àý¾ä£ºThe cattle are grazing in the field. ţȺÔÚÌïÒ°ÉϳԲݡ£ ¶ÌÓï½²½â£º 1. Weeds compete with plantings for water and nutrients. compete withÓë¡¿¹Õù Àý¾ä£ºIt is difficult for a small grocery store to compete with a supermarket. СÉ̵êºÜÄÑÓ볬Êп¹Õù¡£ 2. A crop plant generally produces several hundred seeds. But a weed plant can produce tens or even hundreds of thousands of seeds. hundreds of thousands of ¼¸Ê®Íò,ÎÞÊý,³ÉǧÉÏÍòµÄ Àý¾ä£ºThe city subway carries hundreds of thousands of passenger a day. ÊÐÄڵĵØÏÂÌúÿÌìÔËÔØÊýÊ®Íò³Ë¿Í¡£ 3. Eradicating weeds means that you have to remove all the seeds and roots so the plants will not grow back. grow backÖØÐ³¤³ö Àý¾ä£ºAll her hair was burned off in the fire, but the doctors have promised that it will soon grow back. ËýµÄÍ··¢ÔÚ´ó»ðÖÐÉÕµôÁË, µ«Ò½Éú±£Ö¤ËýµÄÍ··¢»¹»á³¤ÆðÀ´µÄ¡£ 4. A more common way to deal with weeds is to control them enough so that the land can be used for planting. deal withÓ¦¸¶, ´¦Àí; ¶Ô´ý Àý¾ä£ºThere are many difficulties to be dealt with when starting a new business. ¿ªÕ¹Ò»ÏîÐÂÒµÎñʱ, ÓÐÐí¶àÀ§ÄÑÐèÒª½â¾ö¡£ be used forÓÃÀ´×ö¡ Àý¾ä£ºWood is used for making paper. ľ²ÄÓÃÓÚÔìÖ½¡£ 5. He says a dense, competitive crop that quickly shades the soil from the sun will help reduce weed growth. shade fromµ², ÕÚ(¹â»òÈÈ) Àý¾ä£ºShe raised her hand to shade her eyes from the sun. Ëý̧ÆðÊÖÕÚסÑÛ¾¦ÉÏ·½ÒÔµ²×¡Ñô¹â¡£ 6. Other controls include turning over the soil, pulling the weeds or covering them with mulch made of wood, garden waste or other material. turn over (ʹ)·×ª; µ÷ת Àý¾ä£ºThe soil must be thoroughly turned over before planting. Ò»¶¨ÒªÏȰÑÍÁµØÉî·Ò»±éÔÙÏÂÖÖ¡£ cover withÓáÕÚ¸Çס, ÓáÌîÂú Àý¾ä£ºThe field is covered with snow. ÌïҰһƬ»ýÑ©¡£ 7. But even mulch has its limits. Natural resource specialists point out that weeds can be transported in mulch. point outÖ¸³ö Àý¾ä£ºHe pointed out that there was little chance of success. ËûÖ¸³öºÜÉÙÓгɹ¦µÄ»ú»á¡£ 8. Insects and other organisms can also act as biological controls. act asµ£µ±¡; Æð¡µÄ×÷Óà Àý¾ä£ºAn oar often acts as rudder. ½°³£¿ÉÆð¶æµÄ×÷Óᣠ9. Farm vehicles should be kept out of areas with weeds. keep out (ʹ)ÁôÔÚÍâÃæ Àý¾ä£ºThey shut the door and meant to keep us out. ËûÃǹØÉÏÃÅ, ´æÐIJ»ÈÃÎÒÃǽøÈ¥¡£ When is a plant considered a weed? Experts at Penn State University have a simple answer: When the undesirable qualities outweigh the good qualities. Ö²ÎïÔÚʲôʱºò±»µ±×öÔӲݣ¿±öϦ·¨ÄáÑÇÖÝÁ¢´óѧµÄר¼ÒÃǸøÁ˼òµ¥µÄ´ð°¸£¬ÄǾÍÊǵ±²»ºÏÒâµÄÆ·ÖÊ´óÓÚÁ¼ºÃÆ·ÖÊʱ¡£ Consider the fact that crops generally produce several hundred seeds from each plant. By comparison, each weed plant can produce tens or even hundreds of thousands of seeds. And some buried seeds can survive up to forty years -- or even longer. ͨ³£Çé¿öÏ£¬Å©×÷ÎïÿÖê»áÉú²ú¼¸°ÙÁ£ÖÖ×Ó¡£µ«ÊÇÿÖêÒ°²Ý»áÉú²ú¼¸ÍòÉõÖÁ¼¸Ê®ÍòÁ£ÖÖ×Ó¡£ÓÐһЩÉîÂñµÄÖÖ×Ó¿ÉÒÔ´æ»îËÄÊ®ÄêÉõÖÁ¸ü³¤Ê±¼ä¡£ Eradicating weeds means that you have to remove all the seeds and roots so the plants will not grow back. But birds or the wind can reintroduce them to the land. ¸ù³ýÒ°²ÝÒâζ×űØÐë³ýµôËùÓеÄÖÖ×Ó£¬²¢ÇÒ½«Ö²ÖêÁ¬¸ù°ÎÆð£¬ÒÔÃâÆäÖØÉú¡£µ«ÊÇÄñ»ò·ç»á½«ÖÖ×ÓÖØÐ´ø»ØÍÁµØ¡£ A more common way to deal with weeds is to control them enough so that the land can be used for planting. Experts advise using two or more control methods to deal with weeds. ´¦ÀíÒ°²Ý¸ü¼ÓÆÕ±éµÄ·½·¨ÊÇ¶ÔÆä¼ÓÒÔÖзֵĿØÖÆ£¬Ê¹ÍÁµØ¿ÉÒÔ¸ûÖÖ¡£×¨¼Ò½¨ÒéʹÓÃÁ½ÖÖ»òÕ߸ü¶à·½·¨À´´¦ÀíÒ°²Ý¡£ Chemical weed killers or natural treatments like corn gluten can suppress weed growth. Dense planting of a crop can also act as a natural control. »¯Ñ§É±³æ¼Á»òÓñÃ׻Ʒ۵È×ÔÈ»·½·¨¿ÉÒÖÖÆÔÓ²ÝÉú³¤£¬½«×÷ÎïÖÖ³íÃÜЩҲ¿É×ÔÈ»¿ØÖÆÔӲݡ£ Bill Curran is a professor of weed science at Penn State, in University Park, Pennsylvania. He says one of the most common methods for suppressing weeds is dense planting. Bill CurranÊDZöϦ·¨ÄáÑÇÖÝÁ¢´óѧ´óѧ³Ç·ÖУ½ÌÊÚ£¬Ëû˵×î³£¼ûµÄ¿ØÖÆÔӲݵİ취ÊÇÃÜÖ²¡£ He says a dense, competitive crop that quickly shades the soil will help suppress many weeds. The seeds need light to grow, so blocking the sun will reduce weed growth. Ëû˵£¬³íÃÜ¡¢¾ºÕùÐÔÇ¿µÄ×÷Îï¿ÉÒÔ¿ìËÙÕÚ¸ÇÍÁÈÀ²¢ÒÖÖÆ¶àÖÖÔӲݣ¬ÖÖ×ÓÉú³¤ÐèÒªÑô¹â£¬ËùÒÔ·âËøÑô¹â¾Í×èÖ¹ÔӲݵÄÉú³¤¡£ Other controls include turning over the soil, pulling the weeds or covering them with mulch made of shredded wood, garden waste or other material. ÆäËû¿ØÖÆ·½·¨°üÀ¨·ÍÁ£¬ÓÃÊְβݻòÕßÓÃľÖʵØÄ¤£¬»¨Ô°·ÏÆúÎï»òÆäËû²ÄÁϽøÐи²¸Ç¡£ But even mulch has its limits. Natural resource specialists point out that weeds can be transported in mulch. This is also true of soil, grain, hay and animals. µ«ÊǸ²¸ÇÎïÒ²ÓÐÆä¾ÖÏÞÐÔ¡£×ÔÈ»×ÊԴר¼ÒÖ¸³ö£¬ÔӲݿÉÒÔͨ¹ýµØÄ¤½øÐд«²¥¡£Ò²¿ÉÒÔͨ¹ýÍÁÈÀ£¬¹ÈÎ¸É²ÝºÍ¶¯Îï½øÐд«²¥¡£ Yet animals like sheep or goats eat weeds, so they can provide a biological control. Insects and other organisms can also act as biological controls. È»¶ø£¬¶¯Î±ÈÈçÃàÑò»òɽÑò¿ÉÒÔÆðµ½ÉúÎï¿ØÖÆµÄ×÷Ó᪡ªËûÃÇ»á³ÔµôÔӲݡ£À¥³æºÍÆäËûÓлúÌå¶¼¿ÉÒÔÆðµ½ÉúÎï¿ØÖÆµÄ×÷ÓᣠPreventing the spread of weeds is an important part of weed management. Farm vehicles should be kept out of areas with weeds. If that is not possible, then clean off the equipment and your shoes when leaving. ¿ØÖÆÔӲݵĴ«²¥ÊÇÔӲݹÜÀíµÄÖØÒª²¿·Ö¡£Å©Ìï»úÆ÷Ó¦¸ÃÔ¶À볤ÂúÔӲݵĵط½¡£Èç¹û²»¿ÉÄܵϰ£¬À뿪µÄʱºòÒªÇå½à»úÆ÷ºÍЬ×Ó¡£ Some people burn weeds or bury them deeply or make them into mulch. һЩÈ˽«ÔӲݺͻ¨Ô°·ÏÆúÎï´øµ½À¬»øÖÐÐÄ»òÕßȼÉÕ£¬ÉîÂñ»ò½«ËûÃǽÊËé¡£ Professor Curran says another way to make use of weeds is to compost them. Heat is produced in the process of making organically rich compost to improve soil. The heat will kill many, though not all, weed seeds. The same is true for seeds that pass through animals that graze on weeds. Curran½ÌÊÚ˵£¬ÓÃÔÓ²ÝÖÆ×÷¶ÑÖÆ·ÊÁÏÊǶÔÔӲݼÓÒÔÀûÓõĺ÷½·¨¡£ÖÆ×÷Óлú¶Ñ·ÊµÄ¹ý³Ì»á²úÉúÈÈÁ¿¡£ÈÈÁ¿»áɱËÀÐí¶àÔÓ²ÝÖÖ×Ó¡£Å©ÌïÉúÎï¾Ü¾øÔӲݵĹý³ÌµÀÀíÒ²ÊÇÒ»ÑùµÄ¡£ |

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