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...
压缩空气的喷吐使飞机的左右和前后都能保持稳定。Jets of compressed air gave the aircraft lateral and directional stability.高高的烟囱 喷吐 出黑烟.Tall chimneys belch [ vomit ] forth black smoke.工厂的烟囱向空中喷吐着浓烟.The factory chimneys puff dense smoke into the ...
If you get irritated by other people's anger, apathy, ignorance, bitterness, or insecurities, be thankful.如果别人的愤怒, 冷漠, 无知, 苦楚或是不安使你不高兴时, 要心存感激.It's the people with insecurities who make life difficult.就是那些没有安全感...
制造合成角质的层试,导致了赛璐珞的产生.Celluloid resulted from efforts to produce a synthetic horn.赛璐珞的这一特性,使它再度受到了注意.This property has led to a revival of interest in celluloid.它们也可用外晶体材料,例如玻璃 、 赛璐珞或透明塑料等制造.They may also be manufactured f...
The fibre breakage generally occurs in the forepart of the card during carding.梳理过程中纤维的断裂主要发生在梳毛机的预梳部位.The carding effects of card machine were evaluated with the web evenness.从棉网均匀度的角度评定梳棉机梳理质量的优劣.Thea few words about h...