It's possible to hang a nail from a magnet and then use that nail to pick up another nail.

把一颗钉子挂在一个磁体上再用这颗钉子去吸起另一颗钉子是可能的。

《柯林斯英汉双解大词典》

How many of you have a written contract, stuck with a magnet on the fridge, telling you when you're supposed to tidy up?

有人写过协议吗，在上面贴个磁力贴，规定好什么时候由谁打扫房间？

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These prevent the central magnet from moving up and down smoothly.

这样可以避免线圈中央的磁铁上下移动的幅度过小。

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How many of you have a written contract, stuck with a magnet on the fridge, telling you when you're supposed to tidy up.

有人写过协议吗,在冰箱上贴个磁力贴,规定好什么时候该谁打扫房间

耶鲁公开课 - 博弈论课程节选

The city remains a magnet to immigrants, with Latinos making up more than 40% of its population.

ECONOMIST: Trouble in paradise

"You'd have little packets that had this powder in it, you'd fill up your pitcher of water, you'd dump in the powder, stir it up, let it sit for a little bit, and then you'd have a permanent magnet that draws all the minerals down towards the bottom of the pot, and then you pour off the relatively clean water, " he said.

BBC: Millions of Bangladeshis are forced to drink unsafe water

Mining firms make up almost a fifth of the local exchange's market capitalization, and the city has become a magnet for smaller companies, which can be more-acutely affected by the volatility of the commodities cycle.

WSJ: Mining Woes Snag Financial Firms