[交流] 每周一听——那些年我们一起练过的听力（第八期）

每周一听——那些年我们一起练过的听力（第八期）

号外：本期活动奖励升级，全对者除BB奖励以外，另奖励EPI一枚，欢迎积极参与！！给本活动提出积极建议者获EPI一枚。如果对本活动有兴趣就收听我吧

奖项——听写后正确填空者可得BB奖励

评分规则：
每篇设空十处，难度逐渐增加每答对一空奖励一个BB。

   Companion planting is the idea that some kinds of plants can help each other grow. Plants that are compatible together generally have similar needs in terms of nutrients, soil and    (1)    levels.
Advice about which plants are compatible is sometimes based more on tradition than proof. But experts say there is evidence to support certain    (2)    . These can improve harvests, reduce disease and help with    (3)    control by attracting helpful insects.
For example, some kinds of soil bacteria take nitrogen from the air and make it into a form that plants can use. The plants hold the nitrogen in their roots. Legumes are especially good at this nitrogen-fixing. Then any crops that share the same space as the legumes can get the nitrogen as the roots    (4)    .
Beans and potatoes can also share    (5)    well because their roots reach different levels in the soil. Deep-rooted vegetables get nutrients and moisture from lower down in the soil, so they do not   (6)    plants with shallower roots.
But some plants placed together may harm each other's development. For example, tomatoes do not like wet soil but watercress does, so you would probably want to    (7)    .
Some kinds of produce should be kept apart even after being harvested. This is because of ethylene gas. Ethylene is a plant hormone that can cause some foods to    (8)    . Apples release ethylene gas. Apricots, melons and tomatoes also release a lot of ethylene. Some vegetable    (9)    by ethylene, including asparagus, broccoli, cabbage and cucumbers.
This risk of ripening too soon is why markets often separate high ethylene-producing foods from those that are sensitive to the gas.
But if you put an apple in a bag with a green banana, the ethylene from the apple will make the banana ready to eat sooner.
What about peaches, plums and nectarines that are too firm to eat? These kinds of fruit do not need any help from an apple -- they release enough ethylene to ripen themselves. But that does not mean there is no way to get the job done faster.
           (10)            . Keep the fruit at room temperature, out of direct sunlight. Once the fruit is soft enough to your liking, either use it or put it in the refrigerator to keep it from getting too ripe. Yuck.