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。
在化学中,就像在生活中一样,最具变革性的反应往往发生在学科之间的边界上。
Evidence-based policymaking leads to better outcomes.
The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing.
The best way to predict the future is to create it.