He tore my heart， but you broke my life.

我们生活在一个墙有耳、地有眼的世界。

The office of President is one which requires the utmost diligence and attention.

The pursuit of equality requires both individual courage and collective action.

所有人类行为都有以下七个原因中的一个或多个：机会、自然、强迫、习惯、理性、激情和欲望。

The challenge in computational learning theory is to understand the capabilities and limitations of learning algorithms.

真相是个滑溜溜的东西，尤其是在黑暗中。