I have tried hard for her, but all to no purpose.
他想尽一切办法去实现他的目标。
He tried to find out the cause, but all to no purpose.
他试图找出原因，但是全无结果。
No small art is it to sleep: it is necessary to keep awake all day for that purpose.
睡眠是非同小可的一种技术；为此，我们必须醒着一整天呢。
No small art is it to sleep: it is necessary to keep awake all day for that purpose.
睡眠是非同小可的一种技术；为此，我们必须醒着一整天呢。
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