I think we should take care of the environment, so that we have something to leave for our children.
我觉得我们应该保护好自然,以便将来能给我们的子孙后代留下一些东西。
At first I thought I'd done the right thing, but I soon realized that I'd made a mistake.
开始我以为我做对了,但是很快就发现自己犯了个错误。