We have a moral obligation to protect the environment.
我们有道义责任保护环境。
It can protect the environment.
它可以保护环境。
It would help to protect the environment.
这有助于保护环境。
I think we must do something to protect the environment.
我认为我们必须做些什么来保护环境。
The money from tourism is used to protect the environment.
旅游业赚的钱用来保护环境。
Recycling is one way to protect the environment; reusing is another.
骑自行车是一种保护环境的方法，再利用又是另外一种办法。
If we don't act to protect the environment, we will live to regret it.
如果我们现在不采取行动保护环境，我们会遗憾一辈子。
Everyone must assume his share of the responsibility to protect the environment.
每个人都必须承担起保护环境的责任。
It's time we got rid of these bad habits and take action to protect the environment.
我们是时候改掉这些坏习惯并且行动起来保护环境了。
My position on this problem is that we should do whatever we can to protect the environment.
我对于这个问题的观点是我们应该竭尽所能去保护环境。
In order to sort the rubbish properly and protect the environment, people in different countries are using different methods to sort their waste.
为了正确地分类垃圾和保护环境，不同国家的人们正在使用不同的方法来分类他们的垃圾。
They help protect the environment.
它们有助于保护环境。
What should we do to protect the environment?
我们应该做些什么来保护环境？
It is time to protect the environment of the island.
是时候保护这个岛的环境了。
Would you like to join me to protect the environment?
你愿意和我一起保护环境吗？
They think it is their duty to protect the environment.
他们认为保护环境是他们的责任。
They all help spread the ways to protect the environment.
他们都帮助传播保护环境的方法。
As travelers, we should try our best to protect the environment.
作为旅行者，我们应该尽力保护环境。
Do you want to help the old or protect the environment?
你想帮助老人或者保护环境吗？
If we don't protect the environment well, we'll be punished sooner or later.
如果不保护好环境，我们迟早会受到惩罚。
The sky is much bluer because we have taken action to protect the environment.
天空变得更蓝了，因为我们采取了行动来保护环境。
Trees can help protect the environment in many ways because they are pollution fighters.
树木可以在很多方面帮助保护环境，因为它们是污染斗士。
They are planning to set up an organization to protect the environment these days.
这些天他们正计划建立一个组织来保护环境。
I've just read a book which gives ideas about how we can protect the environment.
我刚刚读了一本书，书中给了我们如何保护环境的建议。
In order to protect the environment, many people choose to go to work by subway.
为了保护环境，许多人选择乘地铁去上班。
An ecologist once asked a boy what he thought it meant to protect the environment.
一位生态学家曾经问一个男孩，他认为保护环境意味着什么。
He has learned how to deal with small dangers and how to protect the environment.
他已经学会了如何处理小的危险，如何保护环境。
The public should raise environmental awareness and realize it is everyone's duty to protect the environment.
公众应该提高环境意识，认识到保护环境是每个人的责任。
It will be even worse if we don't take action to protect the environment around us.
如果我们不采取行动保护我们周围的环境，情况会更糟。
We should protect the environment so that we can make a better world to live in.
我们应该保护环境，这样我们才能创造一个更美好的世界。
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