This design has the following functions:1. open and shut the door normally;
本项设计可以实现以下功能：1）正常的车门开与关；
And you have to shut the door. So it's literally physical strength to open and shut the door.
只有身体和精神的双重力量才能打开、关闭那道门。
He shut the passenger door and walked past me to open the driver's side.
他关上车门，从我面前走过打开驾驶员侧。
He shut the passenger door and walked past me to open the driver's side.
他关上车门，从我面前走过打开驾驶员侧。
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