know which way the wind blows
要知道风向如何
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It is as well to know which way the wind blows.
最好知道风吹往哪个方向；识时务者为俊杰。
youdao
You see a leaf fall and you think you know which way the wind blows.
你看到一片树叶落下你以为你就能知道风往哪吹？
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