He took a small key from his pocket and slowly inserted it into the lock.

他从衣袋里掏出一把小钥匙，然后缓缓地将其插入锁孔里。

《柯林斯英汉双解大词典》

It'll look like a small key tag that can be put on your objects.

它看起来像一个小的钥匙扣，可以放在你的物品上。

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A small key was taped to the letter.

信里头附了一把小钥匙。

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Experts say accountability is key in determining the future use of certain practices such as confining thousands of protesters into small areas for hours on end and of some officers removing badge numbers from their uniforms in crowd control situations.

VOA: standard.2009.04.21

Every time you hit the enter key in Notepad or in Microsoft Word, small white lie, those two characters end up getting saved in the file.

在Notepad或Microsoft里，每当你敲回车键时，没有恶意哈，这两个字符,都会保存在文档里。

哈佛公开课 - 计算机科学课程节选

Today one can still descend to the vaulted cellar and inspect two wooden panels one holding glasses behind a well-stocked bar that may be unlocked with a small key and pivoted from floor to ceiling to permit a discreet exit.

ECONOMIST: The caf�� at the heart of revolutionary Cairo

On the left resides a small WiFi key, the microphone and a trio of pinholes that serve as an outlet for audio alerts.

ENGADGET: GoPro Hero3 Black Edition review: taking action cam quality to the next level

The D-Pad can be flipped to the opposite side of the controller using the small mode key so that lefties can join in the fun, too.

ENGADGET: Black Powder Media's Impulse Controller hands-on (video)