adv. vainly ; uselessly ; fruitlessly
misc. bootlessly ; to no end
我不信您显赫的祖先会徒劳无益地玩弄不同的写法。
I do not think that your illustrious ancestor toyed idly with variations.
佛陀不鼓励徒劳无益地穷究一些不能解脱苦恼的推测性问题。
The Buddha discouraged the vain search after speculative issues which do not lead to the release of suffering.
池子里有三条鲦鱼，但是池太大，不可能舀干；徒劳无益地尝试了几次用铁罐子捉鱼后他克制住了自己。
There were three minnows in the pool which was too large to drain; and after several ineffectual attempts to catch them in the tin bucket he forbore.
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