摘要： 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