他们已经失败
They have failed.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他们已经失败过一次了，让他们再失败一次吧。
They have already failed to take down the site once. Let them fail again.
youdao
但是他们已经失败了。
But they have failed.
大多数父母努力防止失败，或不让孩子们知道他们已经失败。
Most parents work hard at either preventing failure or protecting their children from the knowledge that have failed.
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