knife edge divide是什么意思

用法例句

Aspen root rot disease is caused by Fusarium acuminatum Ellis & Everhart.

通过人工诱发试验证明山杨根腐病病原菌为锐顶镰孢菌Ｆｕｓａｒｉｕｍａｃｕｍｉｎａ－ｔｕｍＥｌｉｓ＆Ｅｖｅｒｈａｒｔ，室内用毛壳菌Ｃｈａｅｔｏｍｉｕｍｓｐ。

A new species of the genus Cleptometopus Thomson (Coleoptera:Cerambycidae) from Xizang of China;

西藏锐顶天牛属一新种(鞘翅目:天牛科)