The pain you feel today will be the strength you feel tomorrow.
化学是在分子水平上操纵物质的艺术,而催化是其最强大的画笔。
I don't like to lose money, so I try to buy stocks that are cheap.
电流概念的形成是电学理论发展中最重要的步骤。
I think it's important to keep learning and growing.