------This typewriter is indeed cheap and fine.

　　这部打字机真是价廉物美。

　　------A new kind of aircraft --- small, cheap, pilotless --- is attracting increasing attention.

　　一种新型的飞机正越来越引起人们的注意——这种飞机体积不大，价钱便宜，无人驾驶。

　　------He is a complicated man --- moody, mercurial, with a melancholy streak.

　　他是一个性格复杂的人——喜怒无常，反复多变，有些忧郁寡欢。