The calm is an invisible but very useful capital.
而冷静还是一种无形而又非常有用的资本。
Algebra is not easy for everyone to learn, but it is very useful.
代数对每个人来说都不容易学，但它非常有用。
And we should not imagine that it is. But it is a very useful tool.
并且我们也不应该这样设想，但是这确实是一个很有用的工具。
This can be very useful, but it is not needed in this case.
此属性会非常有用，但是在本例中不需要它。
But anyway I find it a very useful method, I use it quite a bit.
无论如何，我觉得这都是一个非常有用的方法，我很多次都这样用。
This function is very useful, but also very badly named.
这个函数十分有用，但是它的命名非常糟糕。
This alternative has limitations, but can be very useful and is a good performer.
这种方案有一定的局限性，但是非常有用，并且性能很好。
But from that we developed a very useful construct, which is the "for" loop.
然而由此我们发明了一个非常有用的结构，这就是“for”循环。
Storing data is very useful, but often, we want to get some information back.
存储数据非常有用，但我们往往想要获得一些反馈信息。
It might be very useful. But now it is gone.
——或许很有用吧，但是现在文件已经没有了。
这个式子很有用。
这是非常容易的，但有益的。
Last but not least, I think math is very useful.
最后但并非最不重要的是，我认为数学是很有用的。
Very disappointing. Maybe it was useful for some people, but it wasn't for me.
非常令人失望。它可能对有些人有用，但对我没用。
But while that can be very useful it can also detract from positive things.
可是，虽然分析很有用，但是它还会剥夺积极东西。
Neil: Yes, it is very useful but we'll just have to finish there.
是的，非常有用，但是我们要在这里结束了。
I like English too, but I like the computer class best. It is very useful.
我也喜欢英语，但我最喜欢电脑，电脑很有用。
I think English is not easy but it's very useful.
我认为英语不好学，但却非常有用。
Everybody knows his own language, but to know another is very useful.
每人都懂自己的母语，但知道另一门语言也非常有用。
Fire can be very useful, but it can also be very harmful.
火可能很有用，但也可能很有害。
I confess that this is less ambitious, but still very important and useful.
我承认这个方法并不是雄心勃勃，但仍然非常重要和有用。
This encyclopedia is very useful, but I cannot afford it.
套百科全书特别实用，可我买不起。
But very important and useful.
但是很重要、很有用。
But it can be very useful to understand.
但是理解这个单词又是非常有益处的。
But using the brief description attitude problem may not be very useful.
但是光简单的态度问题来解释是没有用的。
But using the brief description attitude problem may not be very useful.
但是光简单的态度问题来解释是没有用的。
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