任何实验的价值和效用都取决于材料是否适合其使用的目的。

The most powerful and enduring brands are built from the heart. They are real and sustainable. They are not manufactured by a marketing department.

"Some infinities are bigger than other infinities."

宇宙充满了惊喜，我们才刚刚开始触及理解它的表面。