... 自然地；天然地 naturally 但是徒然 all their attempts were in vain 空想, 徒然希望 may whistle for it ...
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但是徒然
But in vain
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他试图救他儿子免于溺死，但是徒然。
He tried to save his son from drowning, but in vain.
youdao
她试图阻止他，但是徒然。
She made a vain attempt to stop him.
敌人企图把陈大叔拉过去，但是徒然无效。
The enemy attempted to win over uncle Chen, but it was in vain.
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