It is useless to muse upon past errors.

老想过去的过错是无益的。

Among these useless papers I found a few paper-covered books, the pages of which were curled and damp.

在乱纸堆中，我发现一些平装版的书籍；它们的书页又皱又湿。

If the produce of domestic can be brought there as cheap as that of foreign industry, the regulation is evidently useless.

如果本国产业的生产物在国内市场上的价格同外国产业的生产物一样低廉，这种管制显然无用。

If the beauty of the world is actually patched up , Should I treat it as a piece of treasure ? Or just a useless patchwork ?

这世界的美丽，全都是拼凑出来的，我该将她视为稀世珍宝，还是一块毫无价值的？。

Not really . A friend of mine taught me a little Taijiquan , which I totally forgot. It's useless for fight. Don't you think so ?

不算学过。一个朋友曾经教过我一点太极拳。但我全忘光了。武术对搏斗没有用。难道你不这样认为吗？。

It is useless to talk too much with him! He is just a ignoramus that knows nothing at all .

和他说那么多没用的，他只不过是个什么都不知道的笨蛋。

He felt as if he were not wholly useless -- indeed, in such a stress of weather, quite worth while about the house.

他只是觉得自己还不是毫无用处。的确，在这样恶劣的天气，待在家里还是很有用的。

A brave son of Islam should not be used for lower and useless targets. The utmost effort should be made to avoid civilian casualties.

勇敢的伊斯兰子民不能为无价值和无用的目标而亡，应该尽可能避免平民的伤亡。

Before he had reached the central portion of the city he thought the whole matter over and decided it would be useless.

在到达市中心之前，他把整件事情想了一遍，认定去了也没用。

Many women will tell you and I'm the first to admit that the breathing techniques can be absolutely useless during labor and delivery.

许多女性将会告诉你，我也第一个会承认的是呼吸技巧在分娩过程中简直毫无用处。

I was uneasily aware, however, that there was something a bit dubious about this esotericism - this interest in socially useless flowers.

然而，我不安地意识到，这种密好（esotericism）——这种对从社会的角度来看没有用的花的兴趣——有些可疑。

Explanation is useless, but the sensation remains and, with it, the constant attractions of a universe inexhaustible in quantity.

解释是毫无用途的，但是情感却会保留下来。有了这种东西，宇宙连续不断的吸引力在数量上依然不可穷尽。

Socialist parliamentarian Patrick Bloche called the bill "dangerous, useless, inefficient, and very risky for us citizens" .

社会党议员PatrickBloche认为该法案“危险的，无用的，效率低而且对公民非常有风险的”。