One who gently grasps the doorknob to open and close the door is a careful and responsible person.

手轻轻扶着把手来开关门的，是谨慎而负责的人；

youdao

They make the door difficult to swing open and close, but they work.

它在开关门时的摇晃使得开门不方便，但是它们确实起作用。

youdao

Behind the door. I'm not really a fan of hanging organizers on doors. They make the door difficult to swing open and close, but they work.

门后。我真的不喜欢在门后悬挂整理袋。它在开关门时的摇晃使得开门不方便，但是它们确实起作用。

youdao

And now let's suppose that your parents are going away for the weekend and they leave you with the following instructions: If it's raining tomorrow morning, when you wake up, you are to close the windows, open the door and let the cat in, phone the grocer and have him send over the following list of groceries. All right.

现在假设你们的父母这周末,离开了，给你们留下了,以下的一些指示：,如果明天早上下雨了，醒来的时候，要把窗户关好，打开门,让猫进来，打电话给杂货店并且让他,送来以下的生活用品，好的。

哈佛公开课 - 计算机科学课程节选

The devices, which require that you have a home WiFi network, can be used to turn appliances on and off, let you know if you left your garage door open (and let you close it) or respond to motion in the room.

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That said, the rotating magnetic aluminum door that reveals the SD card and SIM slots is slick -- far easier to open and close than the plastic port covers found on most other slates.

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