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...
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...
She was very striking but in some way I felt repelled.她非常引人注目，但我觉得她有些讨厌。They repelled the enemy.他们击退了敌军.The minister tremulously , but decidedly , repelled the old man's arm.而丁梅斯代尔牧师却 哆里哆嗦 地断然推开了那老人的胳臂....
We left at teatime.我们是在下午晚些时候动身的。At teatime, Victoria sang duets with her Consort, Prince Albert...喝下午茶的时候，维多利亚与其夫君艾伯特亲王表演了二重唱。She was allowed to amuse herself as she liked till teatime.她被允许随心所欲地一直玩到吃茶的时候.We stopped work...