n.[C]

1. 助手，助理；助教；店员
   He worked as an assistant to the President.

   他当过总统助理。

2. 起辅助作用的事物

a.

1. 助理的；辅助的[B]
   He is an assistant cook.

   他是个助理厨师。

2. 有帮助的[（+to）]
   The horse is an animal assistant to man.

   马是对人类有帮助的动物。

n.

1. a person who ranks below a senior person.
2. a person who helps in particular work.