解释:看到兔子再回头唤猎狗,还不算太晚;跑掉了羊再去修补羊圈,也不算太迟。
The free, exploring mind of the individual human is the most valuable thing in the world.
Meeting energy demand while reducing emissions is the defining challenge of our time.
"Words are the bricks with which we build the houses of our imagination."