Both the free hydroxyl groups readily undergo esterification.两个自由羟基,都容易酯化.The chemical method include treating with sulfuric acid, saponification, acylation, esterification, etc.化学方法包括酸洗法 、 皂化法 、 酰化法和酯化法等.Iso - army gall...
对于两个七十几岁的人来说，这段路太远了。It's a long way to go for two people in their seventies.从务实角度来说，音乐电视网的生存依赖于把年轻人市场卖给广告商。Pragmatically, MTV's survival depends on selling the youth market to advertisers.对我们来说是对的东西，对别人来说未必正确。W...
Russian unit of weight equivalent to about 16.4 kilograms ( 36.1 pounds ) avoirdupois.普特俄国重量单位,相当于约16.4公斤 ( 即36. 1磅 )The increase of carbon equivalent is primary reason for graphite floatation.碳当量高是引起石墨漂浮的主要原因.It is anti...
A competition in which these sleds race against a clock.'逆'.''时针比赛这种雪橇''.'逆'. ''时针方向的比赛.Sleds pulled by dogs are in common use in the Arctic.狗拉的雪橇在北极地区很常用.Luge athletes r...