“knockdown”造句，怎么用knockdown造句

Health insecticide coating type WS-I was shown to have very strong knockdown and cidal effect on mosquitoes, flies and cockroachs.

If you've seen video of a knockdown, you know it is clearly frightening and stressful.

Shareen exhibits that knockdown goodwill that you find in many Americans – in spite of having little time on her hands, she volunteers on Saturdays for the Lost Pets charity.