| 查看: 2216 | 回复: 12 | |||
| 当前主题已经存档。 | |||
potassium_ustb金虫 (正式写手)
|
[交流]
常用英文化学分子式、方程式及数学式的读法
|
||
|
常用英文化学分子式、方程式及数学式的读法 Na2SO4 Sodium sulphate; C-a-two-S-O-four Mg(OH)2 magnesium hydroxide; M-g-pause-O-H-pause-twice; M-g-in brackets twice Ca2(PO4)3· 2H2O calcium phosphate two hydrate; C-a-two-pause-P-O four-pause- three times-dot-two-H two-O [Zn(NH3)4]2+ tetra-ammonium zinc complex cation ® give; yield; produce, form,become evolved as a gas; give off a gas ¯ is precipitated; gives X precipitate = reacts reversibly -------------------------------------------------------------------------------- Cu, D in the precence of a copper as a catalyst on heating CO32- + Ca2+ = CaCO3¯ a carbonate anion with a valancy of two plus a calcium cation with a valancy of two produce a calcium carbonate precipitate R’ R prime R” R double prime, R second prime R1 R sub one 100° C one hundred degrees Centigrade + plus; positive - minus; negative ´ multiplied by; times ¸ divided by ± plus or minus = is equal to; equals º is identically equal to » is approximately equal to ( ) round brackets; parentheses [ ] square brackets { } braces a>>b a is much greater than b a³ b a is greater than or equal to b aµ b a varies directly as b lognX logX to the base n x2 x square, x squared, the square of x Xn X to n factors; the nth power of x; x to the power n x -8 x to the minus eighth power ï xï the absolute value of x the mean value of X the sum of the terms indicated; summation of D x or d x the increment of x dx differential x dy/dx the first derivative of y with respect to x ò integral ¥ infinity 1/2 a half; one half 2/3 two thirds 5/123 five over a hundred and twenty-three eight and three over fourths; eight and three quarters 0.01 O point O one; zero point zero one; nought point nought one 6 % 6 percent 3‰ 3 per mille 2 : 3 the ratio of two to three r=xd r equals x multiplied by d 5´ 2=10 five times two equals ten x3/8=y2 x raised to the third power divided by eight equals y squared (a+b-c´ d)/e=f a plus b minus c multiplied by d, all divided by e equals f y = (Wt-W)/x y equals W sub t minus W over x |
回复此楼» 猜你喜欢
PDMS膜在溶液中的离子透过率
已经有0人回复
-
攒人品 论文祈福
已经有139人回复
-
有机高分子材料论文润色/翻译怎么收费?
已经有69人回复
-
science advances的AAAS系统上返修
已经有0人回复
-
science advances的AAAS系统上返修问题
已经有3人回复
-
LDPE黑十字为什么那么大
已经有0人回复
-
西南交通大学医学院2027年接收推荐免试攻读研究生（含直博生）
已经有159人回复
-
西南交通大学医学院2027年接收推荐免试攻读研究生（含直博生）
已经有159人回复
-
西南交通大学医学院2027年接收推荐免试攻读研究生（含直博生）
已经有157人回复
-
西南交通大学医学院2027年接收推荐免试攻读研究生（含直博生）
已经有152人回复
-
博士申请
已经有14人回复
» 本主题相关商家推荐: (我也要在这里推广)
2楼2006-01-23 11:47:33
3楼2006-01-23 13:11:44
4楼2006-01-29 10:20:24
januswen
木虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 3472.1
- 红花: 2
- 帖子: 219
- 在线: 144.4小时
- 虫号: 106594
- 注册: 2005-11-17
- 性别: GG
- 专业: 特种药物
5楼2006-01-29 10:55:43
0.5
 |
6楼2006-01-31 23:29:34
0.5
 |
7楼2006-02-01 11:07:28
小狗
荣誉版主 (知名作家)
我是妖人，我怕人妖
- 应助: 0 (幼儿园)
- 贵宾: 1.8
- 金币: 2394.6
- 红花: 5
- 帖子: 5815
- 在线: 9.5小时
- 虫号: 152837
- 注册: 2006-01-02
- 性别: GG
- 专业: 可再生与替代能源利用中的
8楼2006-02-02 12:12:23
0.5
 |
9楼2006-02-02 12:37:24
10楼2006-02-16 15:04:54
