The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
你送给我桃子,我就回报给你李子。意思是做人要知恩图报,不能忘恩负义。也比喻礼尚往来,相互赠送礼物。
可持续性不是成本;而是对我们共同未来的投资。
"A nation that destroys its soils destroys itself. Forests are the lungs of our land, purifying the air and giving fresh strength to our people."