Two biological agents are used to control Apocheima cinerarius Erschoff larvae.

幼虫期采取两种生物制剂来进行防治。

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And there's only two countries, the U.S. and the former Soviet Union, that had major efforts on trying to create biological warfare agents.

世界上只有美国和前苏联曾经花大力气研究生物武器。

youdao

And there's only two countries, the U.S. and the former Soviet Union, that had major efforts on trying to create biological warfare agents.

世界上只有美国和前苏联曾经花大力气研究生物武器。

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