useful

adj.

1. 有用的, 有益的, 有帮助的
   • He's a useful person to know.
     他是个应该结交的有帮助的人。
   • Information about people's language ability is often very useful.
     有关人们语言能力的信息经常是很有用的。
   • The computer is useful in processing data.
     电子计算机在处理资料方面很有用。
   • It is very useful for a person to know how to swim.
     对一个人来说会游泳是很有用的。
2. 令人满意的
   • The England cricket team scored quite a useful total.
     英格兰板球队得分总数令人满意。