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用英语解释句子.1.It is vital for us to do something to save Earth(i

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用英语解释句子.
1.It is vital for us to do something to save Earth(important;necessary)
2.Without ozone,the sun would burn us up.(if)
3.The atmosphere is essential to living things.(air round Earth; important)
4.The glass keeps much of the heat from getting out.(prevent)
5.The greenhouse effect may cause the level of the sea to rise and flood citis and even countries.(make)
要用到括号内的词.
用英语解释句子.1.It is vital for us to do something to save Earth(i
1 保留地球,我们做某些事情是至关重要的(重要; 必要)
2如果没有臭氧,太阳将使我们发火.(如果)
3.空气对有生命的东西很重要.(在地球的周围的空气; 重要)
4.玻璃制止大部分热出来.(防止)
5温室效应可能引起漂出来的海和洪水citis 和国家的即使的水平.(做)