The key is hanging on a string by the door.

钥匙拴在门边的带子上。

《牛津词典》

The parrots were given the intellectually demanding task of pulling a snack on a string up to their beaks, using a co-ordinated combination of claws and beak.

鹦鹉们被分派了一项对智力要求很高的任务，它们要协调爪子和喙，将一份拴在绳子上的零食拉到它们的喙上。

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Once synthesized, the histones move into the cell nucleus, where a section of DNA wraps around them to form a structure that resembles beads, or knots, on a string.

一旦合成，组蛋白就会进入细胞核，细胞核内的 DNA 片段会将组蛋白包裹起来，形成一种类似串珠或绳结的结构。

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Today the idea lives on in a new generation of string trimmers and edgers that people often call weed whackers.

VOA: special.2011.07.19

You can do it on other instruments but on a string instrument it's the difference.

很多乐器都能奏出颤音,但弦乐器上　这种揉弦产生的颤音是不一样的

耶鲁公开课 - 聆听音乐课程节选

He's got her on a string, right?

小汉斯想把妈妈拴在绳子上，不是吗？

耶鲁公开课 - 文学理论导论课程节选

In that sense, the FLS is an example of the proverbial pushing on a string, in an economy.

BBC: Can banks be forced to lend more?

To a computer, pattern recognition is pattern recognition, whether on a string of DNA or a customer database.

FORBES: From nuclear bombs to net assets

The kelp seeds, grown on a string back at the university lab, are wrapped around the 150-foot lines.

WSJ: Connecticut Seaweed: Life Down on the Kelp Farm