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...
the upgradation of civic facilities in large cities大城市市政设施的改进I feel it is my civic duty to vote.我认为投票选举是我作为公民的义务.It's almost ten miles from here to the civic center.从这儿到市中心差不多有十英里....
Energy transformations go on constantly, all about us.在我们周围,能量始终在不停地转换着.New objects characterizing the structure of complex linear transformations are introduced.本文引入表征复线性变换结构的新对象.Chemical transformations occur.发生了化学转换。O...