1. 传染;侵染;感染
    To infect people, animals, or plants means to cause them to have a disease or illness.

    e.g. A single mosquito can infect a large number of people.
           一只蚊子就可以感染很多人。
    e.g. ...objects used by an infected person.
           被感染者使用过的物品

2. 污染
    To infect a substance or area means to cause it to contain harmful germs or bacteria.

    e.g. The birds infect the milk.
           鸟污染了牛奶。
    e.g. ...a virus which is spread mainly by infected blood.
           主要通过被污染的血液传播的病毒

3. 使受影响;感染
    When people, places, or things are infected by a feeling or influence, it spreads to them.

infect的翻译

    e.g. For an instant I was infected by her fear...
           有那么一会儿她的恐惧也传染给了我。
    e.g. He thought they might infect others with their bourgeois ideas...
           他认为他们可以用他们的资产阶级思想去影响别人。

4. 使(计算机)感染病毒
    If a virus infects a computer, it affects the computer by damaging or destroying programs.

infect在线翻译

    e.g. This virus infected thousands of computers within days.
           这种病毒在短短几天内感染了数千台计算机。