With his door key in his hand, knowing Millie and the kids awaited him, he wouldn't change places with anyone.

手里拿着门钥匙，知道米莉和孩子们正等着自己，他决不会同任何人互换位置。

《柯林斯英汉双解大词典》

When you vacate the room, you should hand over the door key to me.

你搬出房间时，要把房间钥匙交给我。

youdao

If you've seen how a copy of a door key is produced you already understand the principle.

如果你见到门钥匙的生产过程，你就会明白木鞋的制作方法。

youdao

And the degree to which you can have experiences where you are being intimate with the natural world, is part of that sort of key to open the door to those transcended experiences and to the spiritual nature.

你会有一些与自然亲密接触的经历,你能从这些经历中感悟到多少，决定着,你能否打开通往超验和,神性的门。

普林斯顿公开课 - 人性课程节选

He opened his back door with his key and tried unsuccessfully from inside his home to open the front door.

CNN: Charge against Harvard professor dropped

Education is the door to stopping the cycle of poverty and toilets are an important key to that door.

FORBES: Why Toilets, Not Cell Phones, Are Key To Education Around The World

And she's active and doesn't want to carry around a bulky key fob, so the automated door lock buttons were integrated into the key.

FORBES: We Sell Cars, Too