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Oceans Almost three quarters of the earth’s surface is covered in water. / And around 90% of all the living space on Earth i
Oceans Almost three quarters of the earth’s surface is covered in water. / And around 90% of all the living space on Earth i
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2017-05-09
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Oceans Almost three quarters of the earth’s surface is covered in water. / And around 90% of all the living space on Earth is contained in the oceans. / These vast reserves cradled early life / and continue to be home to a wealth of extraordinary creatures. / At least 230,000 unique species have been documented, / although as humans have only explored a small fraction of the depths, / there may be as many as two million. / As well as being home to marine creatures, / the oceans offer a range of critical services, / including acting as a source of food and regulating the atmosphere. /
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专业英语四级
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