Computers can be used to do a lot of work now.

　　如今電腦可用來做許多事。

　　Time is be used to do something valuable.

　　時(shí)間是用來干有意義的事情的。

　　Meanwhile, the solid model can be used to do some gear geometric analyses.

　　同時(shí)，可用實(shí)體模型對(duì)齒輪進(jìn)行幾何分析。

　　And elephants can be used to do some heavy jobs.

　　象能用來干重活。

　　This graphics object can be used to do vector drawing on the sprite.

　　這個(gè)圖片對(duì)象可被用來在sprite上進(jìn)行矢量作圖。