她在自卫课上学会了如何正确用拳猛击。

She learned how to punch properly in her self-defense class.

你知道如何正确用连字符连接这些术语吗？

Do you know how to correctly hyphenate these terms?

我已经教给他如何正确用刀。

I've taught him how to use a knife properly.

结果：工艺、花袜市场经商人员嗓音疾病发生率分别为22.71%、41.93%，嗓音疾病主要由不正确用声及市场噪声引起，女性发病率（39.80%）明显高于男性（28.27%）。

Results: The incidence rate of disease on voice was 22.71% in craft market and 41.93% in socks market, and it was 39.80% in female and 28.27% in male.