有一个人从天堂来到人间旅游，他所使用的是有效三十天的减价票，他试图要把他的回程票卖掉。
Ingersoll's story of the man that went down from heaven on a reduced-rate excursion ticket good for 30 days --- and tried to sell his return ticket.
The quest for a unified theory of physics is one of the greatest intellectual adventures of our time.
数学的美只向更有耐心的追随者展示。
I'm a human being and I fall in love and sometimes I don't have control of every situation.
要养活世界，我们必须首先学会尊重地球的极限。
她就是这么说的。
生命是一袭华美的袍，爬满了蚤子。
所以根基树立不牢的人，不要期望有茂盛的枝叶。