1. Chicken pox is a contagious disease.
    水痘是一种通过接触而传染的疾病。

2. Yawning is often contagious.
    打哈欠常易于感染。

3. Her laughter''s contagious!
    她的笑声富于感染力！

4. contagious

4. Fear can be contagious.
    恐惧会感染他人。

1. 传染性的：contact 接触 | contagious 传染性的 | contain 包含,容纳

2. 会传染的：疾病控制中心 Disease Control Center | 会传染的 contagious | 呼吸道疾病 respiratory disease

3. 接触传染性的：breathing system 呼吸系统 | contagious 接触传染性的 | infect v. 传染,使感染

1. （病）接触传染的
    A disease that is contagious can be caught by touching people or things that are infected with it.

    e.g. ...a highly contagious disease of the lungs.
           极具传染性的肺病

2. (感情、态度等)感染性的，会迅速蔓延开的
    A feeling or attitude that is contagious spreads quickly among a group of people.

    e.g. Laughing is contagious...
           笑是有感染力的。
    e.g. Antonio has a contagious enthusiasm for the beautiful aspect of food.
           安东尼奥对食品赏心悦目这一方面的热情非常有感染性。

1. (of disease) capable of being transmitted by infection

    Synonym: catchingcommunicablecontractabletransmissibletransmittable

2. easily diffused or spread as from one person to another

    e.g. a contagious grin