a liquid for washing your hands in order to get rid of harmful bacteria from them

Public health officials have urged people to slow the spread of flu by washing their hands frequently or using a hand sanitizer. 公共卫生官员呼吁人们经常洗手或使用免水杀菌洗手液来减缓流感的传播。

He was constantly rubbing his hands with sanitizer because he had a lot of hands to shake. 他因为要跟很多人握手，所以不断用免水杀菌洗手液搓手。

a liquid or device for cleaning objects carefully in order to get rid of harmful bacteria from them

The mats are cleaned with bleach-based sanitizer. 垫子用漂白剂类消毒剂清洗。

The toothbrush sanitizer is a high-tech toothbrush holder that bathes your toothbrush with ultraviolet light, which eliminates 99.9% of germs and bacteria. 牙刷杀菌器是一种高科技牙刷架，将牙刷笼罩在紫外线里，可以消除99.9%的病菌和细菌。