Carbon dioxide, which makes a barrier between us and the sun, prevents heat from getting out of the atmosphere.

二氧化碳在我们和太阳之间形成了一道屏障，阻止热量从大气中散发出来。

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Carbon dioxide, which makes a barrier between us and the sun, prevents heat from getting out of the atmosphere, so the earth is becoming warmer.

二氧化碳在我们和太阳之间形成了一道屏障，阻止热量从大气中散出，因此地球变得越来越热。

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They could form a body to oversee the operation of a school, contracting out the day-to-day activities and countering the barrier that most parents are too busy to run a school.

他们可以建立一个监管学校管理的机构，把学校的日常管理承包出去并且克服多数家长没有空闲来管理学校的障碍。

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The fish that,for one reason or another, that found their way past the barrier, we suppressed them and try to take them out of the system to keep them from establishing in Lake Michigan."

VOA: standard.2010.07.20

It's not just the tinny noise that leaks out of the puny ear buds but the barrier the device erects between people.

BBC: Has the iPod made us anti-social?

So it's like the Corps of Engineers removed a coastal barrier that used to be made out of ice and the coast is no longer protected.

NPR: Oceanographer Sees Real Effects of Climate Change

The Senate has no such barrier in its bill out of the committee.

NPR: Senate Panel Approves Immigration-Reform Proposal