parasite

来自希腊语parasitos,坐在别人旁边吃饭的，吃剩饭的，来自para-,在旁，在周围，sitos,食物，词源同sitophobia.引申词义寄生虫。

parasite (n.)

1530s, "a hanger-on, a toady, person who lives on others," from Middle French parasite (16c.) or directly from Latin parasitus "toady, sponger," and directly from Greek parasitos "one who lives at another's expense, person who eats at the table of another," from noun use of an adjective meaning "feeding beside," from para- "beside" (see para- (1)) + sitos "food," of unknown origin. Scientific meaning "animal or plant that lives on others" is first recorded 1640s (implied in parasitical).

1. One of the ways the parasite spreads is through fecal matter.

寄生虫传播的一种方式是通过排泄物。

2. The lazy man was a parasite on his family.

那懒汉是家里的寄生虫.

3. The mistletoe plant is a parasite on trees.

槲寄生是寄生于树上的植物.

4. I don't want to be a parasite. I must earn my own way in life.

我不想做寄生虫, 我要自己养活自己.

5. There are two kinds of drags, parasite drag and induced drag.

阻力有两种:寄生阻力和诱导阻力.