* Dịch A-V: Most of the world"s surface is water.We may know the land very well,but we know very little about the oceans. Until recently,man could not stay underwater for long.A pearl diver,for example,couldn"s stay underwater for longer than two minutes.But now,with special breathing ... can learn more about the undersea world thanks to this invention. - THE END-
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18 tháng 3, 2017
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thienbinh_2004
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