catch on是什麼意思？

catch on意思是：明白；流行

例句

This new smartphone app is catching on quickly among the younger generation.
這個新的智慧型手機應用在年輕一代中迅速流行起來.

It took her a while to catch on to the joke, but when she finally did, she laughed loudly.
她花了一段時間才明白這個笑話, 但當她終於明白了, 她大聲笑了.

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