Such water would be useless in improving physical performance, however, since the only way to get oxygen into the bloodstream so that it can be absorbed by the muscles is through the lungs.
然而，这样的水对提高身体机能毫无用处，因为只有通过肺部才能将氧气吸入血液，从而被肌肉吸收。
The only trouble is that it would be so dim as to be next to useless.
这种灯的唯一缺点就是它会暗到几乎没什么实用性。
It wasn't until recently that the first ATM's appeared, and even now they're only connected to a network so small that it renders them useless to many foreigners.
直到最近才出现了第一台atm机，而且连的网络非常小以致很多外国人没法使用。
The bearing for motor was not so bent as to be completely useless. We only required it to be re-aligned.
电动机轴承弯曲，但没有严重到不能使用，我们只要求重新对直。
It's not only useless to trouble him but it is needless to do so.
去麻烦他不仅没有用而且没有必要。
It's not only useless to trouble him but it is needless to do so.
去麻烦他不仅没有用而且没有必要。
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