worldalmostonlythemuchcansee显微镜
摘要：Almost 90 percent of snow is air.A-polar bear weighs(重)as much as ten humans.The smallest snowman in the world is only 0.01mm,tall. We can only see it through the microscope(显微镜).The coldest temperature(温度)in the world was -89.2 degrees(度)in Antarctica(南极洲).
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