Computers can be used to do a lot of work now.
如今电脑可用来做许多事。
Time is be used to do something valuable.
时间是用来干有意义的事情的。
Meanwhile, the solid model can be used to do some gear geometric analyses.
同时，可用实体模型对齿轮进行几何分析。
And elephants can be used to do some heavy jobs.
象能用来干重活。
This graphics object can be used to do vector drawing on the sprite.
这个图片对象可被用来在sprite上进行矢量作图。