Prices may be altered without notice.
价格变动不另行通知。
Prices did not alter significantly during 2004.
2004年期间，价格没有大的变化。
He had altered so much I scarcely recognized him.
他变得我几乎认不出来了。
Programs are expensive, and even more so if you have to keep altering them.
买软件很贵，要是老得更换，那就更贵了。
The landscape has been radically altered, severely damaging wildlife.
地貌彻底改变，严重损害了野生动物。