释义：眼睛随便乱看就会使你惑乱，耳朵随意乱听就会使你迷惑，嘴巴随意胡说就会给你带来乱子。警示人们在日常生活中要保持谨言慎行的态度，以免招来祸患。

While statistics say that 95 percent of all young men who enter business fail, this should not discourage any one. Go out with the spirit “sink or swim,”and a person will not sink.

But only in their dreams can men be truly free. Twas always thus, and always thus will be.

里氏替换原则是面向对象编程中的一个基本概念，它指出子类的对象应该能够替换超类的对象而不影响程序的正确性。