军车遭到伏击.The military vehicles were ambushed.军车封锁了所有出城的道路.Military vehicles barred all the roads out of the city.公开发表的报道表明,海军陆战队是在一辆军车被炸后杀害平民的.Published reports say Marines killed the civilians after a military convoy was ...
天文学家能够测定每颗恒星的亮度。An astronomer can determine the brightness of each star.星星的光亮度各不相同.Stars vary in brightness.用18瓦的荧光灯灯泡有同样的亮度，而用电量却减少75％。With an 18-watt fluorescent bulb you get as much light but use 75% less electricity....