We will go out for a walk, weather permitting.如果天气好,我们就出去散散步.Weather permitting, we'll go to the mountains.天气允许的话, 我们就到山区去.( Permitting a call while other data is being accessed is a preferable alternative. )通话结束后,要...
NASA has started a 10-year search for extraterrestrial intelligence.美国航空航天局已经启动了一个为期10年的寻找外星人的项目。One theory about the existence of extraterrestrial life rests on the presence of carbon compounds in meteorites.地球外存在生命的理论是...