You know, in the Middle Ages, in England, when you met a very poor person, that person would be described as an "unfortunate" -- literally, somebody who had not been blessed by fortune, an unfortunate.
你知道，在中世纪的英国，但你遇见一个非常穷苦的人，你会认为他“不走运”，直接地说，那些不被幸运之神眷顾的人。
Sometimes the things that are most real are the things you can't see.
当你最不抱期望时，研究的坚持往往会带来回报。
The ladder of success is best climbed by stepping on the rungs of opportunity.
大陆并非永久固定，而是处于不断的变化和运动中。