为防止传染，他们每天对教室进行全面消毒。

Wèi fángzhǐ chuánrǎn, tāmen měitiān duì jiàoshì jìnxíng quánmiàn xiāodú.

To prevent infection, they disinfect the classroom thoroughly every day.

护士先给伤口消毒。

Hùshi xiān gěi shāngkǒu xiāodú.

The nurse disinfected the wound first.