科学应该始终为人类服务,而不是反过来。
Sun don't shine forever, but as long as it's here then we might as well shine together.
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。