keep a certain distance

• 保持一定距离

keep a certain distance的用法和样例：

例句

1. Keep some space between you and the car ahead.
   在你与前面的汽车之间要保持一定距离。
2. Mark was told to keep his distance from the girl across the street.
   马克被告知要和街对面的那个女孩子保持一定距离。