我不在乎别人是否怀疑我，我相信自己。
I don't care if people doubt me. I believe in myself.
每个词都是通向自由的一步。
When buying a garden hose， an extension cord， or a ladder， get one substantially longer than you think you need. It’ll be the right size.
数学是关于概念之间关系的科学，与这些概念的内容无关。