石化还可能同时涉及将死亡的动植物的原有物质与不同成分的矿物质进行交换的作用。

Petrifaction may also involve a simultaneous exchange of the original substance of a dead plant or animal with mineral matter of a different composition.

youdao

政策毕竟是政策，但是你可以进行交换，你可以用学分来换取下个学期的书。

Policy is policy after all, but you can make an exchange and you can use the credit for your books for next semester.

youdao

在握手过程中，会对证书进行交换。

During the handshake, certificates are exchanged.

youdao

So, these are all involved with our ability to maintain homeostasis by exchanging materials with the external environment.

这个过程关乎人体维持内稳态的能力,内稳态通过与外环境进行物质交换来实现

耶鲁公开课 - 生物医学工程探索课程节选

And what we did is gift-giving.

我们进行了礼物交换。

麻省理工公开课 - 媒体、教育、市场课程节选

If we had the proper risk management institutions in place, people would have anticipated this risk and would have made swaps or other arrangements to protect themselves against it.

如果我们有合适的风险管理机构，人们能够预料到这种风险,能够提前进行交换或者其他安排,保护自己免受损失。

耶鲁公开课 - 金融市场课程节选