This tennis racket absorbs shock on impact.

这个网球拍能减轻撞击所产生的剧烈震动。

《牛津词典》

I put up with a lot from this guy. He borrowed my clothes, he borrowed my money, he borrowed my tennis racket. But when I caught him using my toothbrush that was the last straw, so I kicked him out!

我对这个家伙够宽容的了。他借我的衣服穿，问我借钱，借用我的网球拍。可是，当我发现他用我的牙刷的时候，这就叫我无法忍受了。所以我把他赶了出去。

youdao

The collector basically looks like a tennis racket filled with ice cubes, so this is kind of like a big ice-cube tray, and each ice cube is not made out of ice, but it's made out of this aerogel.

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And the thing caught in a tennis racket sort of made out of aerogel, this really wispy, smoky sort of solid, right?

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