If used improperly, it can do harm to you.

如果使用不当，它可以伤害你。

youdao

It can affect the performance of an application if used improperly.

如果不当使用，会影响应用程序的效能。

youdao

Imagination is more important than knowledge. Your mind is your most valuable asset, but if used improperly, it will be your biggest liability.

想象比知识更重要。你的头脑是你最有用的资产，但如果使用不当，它会是你最大的负债。

youdao

Dr.Nissen points out that many over the counter drugs - aspirin,ibuprofen, acetaminophen or paracetamol - can be toxic if used improperly.

VOA: standard.2010.03.02

Doctors had injected her with an antinausea drug called Phenergan, made by Wyeth, which if used improperly can cause gangrene.

FORBES: Can you sue a company for a product the feds approved?