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1·She closed her eyes tightly in a vain attempt to hold back the tears.

她紧闭双眼，却无法忍住眼泪。《牛津词典》

2·It was a vain attempt to shift the responsibility for the murder to somebody else.

把这项谋杀的罪责转嫁于他人是徒劳之举。《柯林斯英汉双解大词典》

3·The drafting committee worked through the night in a vain attempt to finish on schedule.

起草委员会徒劳地通宵工作想按期完成工作。《柯林斯英汉双解大词典》

4·She made a vain attempt to stop him.

她试图阻止他，但是徒然。

5·He made a vain attempt to reach the drowning child.

他试图接近那个快淹死的小孩，但没有成功。

6·He made a vain attempt to reach the drowning child.

淹死的小孩，但没有成功。

7·She made a vain attempt to persuade him to lend her the money.

她企图劝他借钱给她，但那只是徒劳。

8·The caged bird flapped its wings in a vain attempt to fly away.

笼子哩的鸟拍打着翅膀想飞走，但却徒劳无功。

9·But as to the causes of these general causes we in vain attempt the discovery.

但是我们试图发掘一般性成因的由来，这个过程的尝试皆是枉然。

10·It was a vain attempt by whites to make an 7 Aboriginal child more like them.

白种人以为如此一来就可以把土著居民的孩子变得和他们大致一样，却不过是白费心机。