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》

They put the key in the door and entered.

他们用钥匙开了门然后走了进去。

《柯林斯英汉双解大词典》

Take your room key and ID, close and lock the door to your room.

带上房间钥匙和身份证，然后关好房间的门并锁上。

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Most female-only floors have added extra security--usually a key-card door and a female-only staff.

FORBES: My Time

The door to the facility is controlled by member-specific key cards so that Kent Dahlgren, the bowl's overseer, can swiftly cut off access when someone ignores the rules.

WSJ: I Say, That's One Gnarly Grind You Just Executed

In an effort to investigate ways that hospitals can improve outcomes through decreasing door-to-balloon times, he initiated and chaired the steering committee of D2B: An Alliance for Quality, an international campaign launched by the American College of Cardiology to implement key evidence-based strategies to achieve guideline recommended door-to-balloon times.

FORBES: Harlan Krumholz - Outcomes - Archive