问题：常用英文化学分子式、方程式及数学式的读法
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时间：2005-12-26 13:39:27 编辑加入/取消收藏订制/取消短消息举报该贴

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 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
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

药品的化学名称反映出该药品的化学结构组成成分，可借助英汉化学化工词典进行翻译。如果名称很长，可以分解开来，分别查出各个组成部分的名称，组合而成。例如：Catalin（卡他林）的化学名称是1－Hvdroxy- 5－oxo-5H－pyrido（3，2－a）－Phenoxazine－3-carboxylic acid,译成汉语是1-羟基－5－氧－5H－吡啶开(3，2－a)吩嗪－3－羧酸。如能掌握一些常用的酸、碱、盐、基因、化合物的英文名称，以及常用的前缀、后缀等，翻译时会顺利得多。例如：chloride氯化物，sulfate（sulphate）硫酸盐，acetyl一乙酰基，amino氨基，di-二，dihydro-二氢。nitro-硝基，－ester酯，－lactone内酯，－one酮、－oxide氧化物，－urea脲等等.

回复人：流氓太子,▲ (功能高分子材料以及乳液聚合方面的研究) 时间：2006-01-04 15:18:31 编辑	1楼
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回复人：taokefan,▲ (new member) 时间：2006-01-06 20:34:10 编辑	2楼
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回复人：may,▲ () 时间：2006-01-08 10:04:40 编辑	3楼
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回复人：flychem,★ () 时间：2007-06-27 10:03:43 编辑	4楼
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回复人：lycheng,▲ () 时间：2005-12-26 13:53:10 编辑	5楼
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回复人：roberzhang,▲ (高分子材料) 时间：2005-12-30 10:19:30 编辑	6楼
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