bacteria
n. 细菌（bacterium的复数）
例句
Chlorine is added to kill bacteria.
加入氯以杀菌。
《柯林斯英汉双解大词典》
The bacteria are harmless to humans.
这些细菌对人无害。
《牛津词典》
The bacteria were growing in a sugar medium.
细菌在糖基中生长。
