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Astronaut Sounds Alarm on Asteroids If a big asteroid with Earth's name on it were to reach us unimpeded, well, we could go the way of the dinosaurs. 阅读全文
摘要:
投入的资金数量惊人.The capital sunk in it is fabulous in amount.泡沫橡胶隔绝性能良好.Foam rubber provides good insulation.身体健康和精神健康是紧密的联系在一起的Physical health is inextrica 阅读全文