Quicksort
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🗣️ 情景例句
No, I think it's important to do it now.
不 ，我觉得还是应该现在动手术。
He has gone to America.
他去美国了。[动作结束后的结果持续至今]
Mr Zhu, have you seen the sea?
朱先生，您看见大海了吗？