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set sb free 释放某人，解放某人
例如：
As soon as she arrived, she set about tidying up(整理)the room.
Try to set aside some time each day for exercise.
They’ ve set off on a trip round the world.
Together the four men set out to look for the lost animal.
He set out to write a history of civilization(文明).
We’ ll certainly set up a complete modern industrial system.
A few scarecrows(稻草人)were set up in the field.
Let’s set up the tent first, and build the fire later.
The police are trying to find out who set fire to the building last night.
He was set free after three years in prison.
Comrade Lei Feng set a good example to us all.
【stand短语】
stand by sb = support sb = take sb’s side 支持某人
stand for 代表，表示，象征，容忍，支持/拥护，为……的候选人
stand out 突出，显眼 stand up 起立，站起来
stand still = stay still 站着不动
例如：
CPC stands for the Communist Party of China.
Stand still, and let me take a picture of you.
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