5 sentences for 危害 (wēi​hài — harm)

1. 吸烟严重危害身体健康。

   xī​yān yán​zhòng wēi​hài shēn​tǐ jiàn​kāng.

   Smoking is seriously harmful to one's health.

   Source: Dong Chinese Dictionary

2. 这种危害社会的渣滓必须受到严惩。

   zhè zhǒng wēi​hài shè​huì de zhā​zǐ bì​xū shòu​dào yán​chéng.

   This kind of social scum must be severely punished.

   Source: Dong Chinese Dictionary

3. 并非所有的致病性微生物都会对人类产生危害。

   bìng fēi suǒ​yǒu de zhì​bìng​xìng wēi​shēng​wù dōu huì duì rén​lèi chǎn​shēng wēi​hài.

   Not all pathogenic microorganisms are harmful to humans.

   Source: Dong Chinese Dictionary

4. 那个年代的侠客常会去剪除那些危害百姓的恶霸。

   nà gè nián​dài de xiá​kè cháng huì qù jiǎn chú nà​xiē wēi​hài bǎi​xìng de è​bà.

   In that era, chivalrous heroes would often eliminate the bullies who oppressed the common people.

   Source: Dong Chinese Dictionary

5. 对于危害公共安全的犯罪行为，必须毫不留情地予以打击。

   duì​yú wēi​hài gōng​gòng ān​quán de fàn​zuì xíng​wéi, bì​xū háo​bù​liú​qíng de yǔ​yǐ dǎ​jī.

   Crimes that endanger public safety must be dealt with mercilessly.

   Source: Dong Chinese Dictionary