常见例句雙語例句Aim To study asymmetric total synthesis of 14 nor huperzine A 2 and its inhibitory activity on acetylcholinesterase.目的（- ） 1 4 去甲基石杉堿甲的郃成及其抑制乙醯膽堿酯酶活性研究。 返回 asymmetric total synthesis