化学是连接物理学和生物学的核心科学。
The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.
在不确定的时期,目标的清晰性变得更加关键。
I'm saving my voice for the stage. I don't talk much in real life.
买本家乡或区域的最新版旅游指南。像游客一样去了解(熟悉的环境)信息,你会学到很多东西。