If there were no clouds


we should not enjoy the sun.



If winter comes,


can spring be far behind?



If you don't climb the mountain,


you can't see the view.



If you don't crack the shell,


you can't eat the nut.



If you don't improve today,


you'll grow worse tomorrow.



没有云我们就不会享受太阳。



冬天来了，春天还会远吗？



不爬上山，你就看不到风光。



不把壳打开，你就吃不到果仁。



今天不改进，你的明天将更糟糕。