我们今天所做的每一个决定都会在未来的海洋生态系统中产生回响。

"A personality is a full Congress of orators and pressure-groups, of children, demagogues, communists, isolationists, war-mongers, mugwumps, grafters, prayer-meetings, spiritualists, and astrologers."

不同元素的原子通过它们的重量相互区分。