有害

吸烟有害健康。

xī yān yǒu hài jiàn kāng.

Smoking affects your health.

吸烟对身体有害。

xī yān duì shēn tǐ yǒu hài.

Smoking is not good for the health.

它对你的眼睛有害。

tā duì nǐ de yǎn jing yǒu hài.

It's really bad for your eyes.