The type system in particular provides you with probably unintended but quite useful error-trapping possibilities.

具体来说，类型系统为您提供了可能未预料到，但非常有用的错误捕捉可能性。

youdao

Cell phones can be quite useful in emergency situations but there is definitely a limit to how much they should be used.

紧急情况下电话确实是非常有用，但是对其使用一定也得有个限度。

youdao

You won't need to specify the -v flag on subsequent connections; but it is quite useful to do so while testing a connection.

在后续连接中不必指定- v标志，但该选项对测试连接颇为有用。

youdao

So it's a useful way of not quite knowing in advance what you want to put in a string, but being able to create strings, phrases, sentences, dynamically.

这是一个很有用的方法，如果你之前不是很了解,在句子中要加入什么，但是这个方法可以,动态地创建字符串，短语，句子。

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Oximeters aren't exactly the sexiest gadgets in the world, but they're definitely quite useful.

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This technique does not always work, but sometimes it can be quite useful.

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But, those rate readouts can be quite useful while involved in any sort of physical activity, making them a necessary hindrance.

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