释义:只有经过艰苦的努力和考验,才能发现或创造出价值重大的事物。
剧院是一面反映人类状况的镜子。
Innovation is not about being the first; it's about being the best.
The future of drones is intelligent, collaborative, and autonomous.
悲伤就是知识
Scientific curiosity must be matched with commercial discipline to bring treatments to those who need them.