have you heard the saying what goes up must come down well what goes up and never goes down
你有没有听过这样一句话:上升的一定会下降，上升的永远不会下降
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Have you heard the saying: what goes up must come down? Well what goes up and never goes down?
你听说过吗：什么升起来一定要落下去，什么升起来从来不落下去？
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