1.bacterial infection 细菌感染

例句：If you get a bacterial infection, you can take an antibiotic to treat it.

假如你收到了细菌感染，你可以用抗生素去对付它们。

2. come alive 活跃起来

例句：As she worked with him, his mind seemed to come alive.

和她在一块的时候，他的头脑好像又活跃起来了。

3.decide to 决定

例句：It all depends on what you decide to believe.

这一切都取决于你决定要相信什么。

4.human being 人类

例句：The tree takes the shape of a human being.

这棵树呈人的形状。