bacterium造句

They found a bacterium visible to the human eye.
他们发现了一种肉眼可见的细菌。

They have isolated the bacterium in its pure form.
他们已经把细菌分离出来,使它们处于较纯的状态.

A bacterium is identified as the cause for his duodenal ulcer.
一种细菌被断定为造成他十二指肠溃疡的根源.

• #bacterium