只有通过保护环境,我们才能向子孙后代承诺给他们一个美丽的地球。
Only by protecting the environment can we assure our later generation of a beautiful planet.
为了使我们的环境更美丽,我们不应该砍伐树木。
We should not cut down trees in order to make our environment more beautiful.
我们将在桑格拉山谷享受美丽的环境。
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