Other researchers, meanwhile, have beenpondering what to do if an asteroid is detected that is indeed on a collisioncourse with Earth.
同时，其他研究人员一直在思考这样一个问题，如果发现一颗小行星的确将与地球发生碰撞，我们又该采取怎样的措施。
Other researchers, meanwhile, have beenpondering what to do if an asteroid is detected that is indeed on a collisioncourse with Earth.
同时，其他研究人员一直在思考这样一个问题，如果发现一颗小行星的确将与地球发生碰撞，我们又该采取怎样的措施。
应用推荐