turn the back upon

• vt. 离开(逃走)

turn the back upon的用法和样例：

例句

用作及物动词 (vt.)

1. Turn off the lights when you leave.
   离开时把灯熄掉。
2. He was mobbed as soon as he left the house.
   他一离开那房子就遭到了人群的袭击。