解析：菩提比喻智慧，明镜比喻清净心。本来清净，又哪里会染上什么尘埃？

In the end, all stories are about the search for meaning.

质量不是一种行为，而是一种习惯。

乳制品应该既营养又美味。

The most important thing is to try and inspire people so that they can be great in whatever they want to do.

A scientific man ought to have no wishes, no affections, a mere heart of stone.  

好的设计是解决问题，而不仅仅是让事物看起来好看。