off limits (also off-limits)

• 1. 

  ADJ If a place is off limits to someone, they are not allowed to go there. 禁止入内的

  例：

  Certain areas have been declared off limits to servicemen.

  已经宣布一些地区军人不得出入。

• 2. 

  ADJ If you say that an activity or a substance is off limits for someone, you mean that they are not allowed to do it or have it. 禁止使用或拥有的 [v-link ADJ]

  例：

  Fraternizing with the customers is off limits.

  禁止与顾客过从甚密。