“有用”的反义词有哪些

“有用”的拼音为：yǒu yòng...

“有用”的近义词/同义词：有效。...

“有用”的英语可以翻译为：useful，serviceable，avail，availability，be of use ...

生意场上，不动声色会非常有用。In business a poker face can be very useful.有很多特效的时候，高清电视就格外有用了。HDTV is especially useful if there are a lot of special effects.小剂量的止痛药对于降低体温非常有用。Pain-killers are very useful in small amounts to bring your...