Ecosystems change over time, with or without the involvement of mankind, so no one can tell what Hawaii should look like.

不管有没有人类的影响，生态系统都会随时间演变，因此没有人可以说出夏威夷看起来应该是什么样的。

In this study, instead of teaching students that their smartness can change, we taught them that their social standing—that is, whether they are bullied or excluded or left out—can change over time.

在这项研究中，我们没有告诉学生，他们的聪明才智是可以改变的，而是告诉他们，他们的社会地位是可以改变的，也就是，无论他们是否受到欺凌或被排挤，那都会随着时间的推移而改变。

Some plastic materials change over time.

有些塑料随着时间的推移而改变。

Parents need to remind their children that their needs and desires may change over time, said Julie Gurner, a real estate analyst with FitSmallBusiness.com.

Fit Small Business 网站的房地产分析师朱莉·古纳说，父母需要提醒孩子，他们的需求和愿望可能会随着时间的推移而改变。

Any take-back program will likely change over time, depending on what works for your customers and company goals.

任何回收计划都可能随着时间的推移而改变，这取决于对你的客户和公司目标吃哪一套。