n.桿狀菌；細(xì)菌
We can not see bacillus with eyes. 我們不能用肉眼看到桿狀菌。
The bacillus can attack us from many ways. 細(xì)菌能從許多途徑侵入我們。
n.乳酸桿菌
n.肺炎桿菌
