译文：祸到临头后悔已经来不及了，船驶到江心弥补漏洞已经无济于事。赏析：我们说话做事都要谨慎，凡事都做最坏的打算，要防患于未然才能减少失误和差错。

The environment shapes behavior through the mechanism of reinforcement.

我是一个赢家，我喜欢赢。

Sustainability isn't a trend—it's a responsibility we owe to future generations.

It is India that gave us the ingenious method of expressing all numbers by means of ten symbols, each symbol receiving a value of position as well as an absolute value.