Isabelle placed a wine cup on the table within his reach.伊莎贝尔把酒杯放在桌上他伸手可及的地方。He placed the ball and tried a couple of feints.他把球放好，试着虚打了几下。We had kept its presence hidden with a strategically placed chair.我们用一张摆放得很巧妙的椅子将...
它为制取1.6-二羰基产物开辟了广阔天地.This opens up a wide field of 1.6 - dicarbonyl products.这些部位包括羧基 、 羰基 、 环氧基和氨基等.These sites include, carboxyl, epoxy, amino and the like.对羰基的加成作用是有机化学中最重要的反应之一.Addition to carbonyls is one of the mos...