引用俗语说明运势变化的无常性。

To understand chemistry at its most fundamental level, we must look at the dance of electrons in molecules.

They had said that the city was a paradise, but I found it a hell.

We don't inherit the ocean from our ancestors; we borrow it from our children.

The heart of the Waldorf method is that education is an art—it must speak to the child's experience. To educate the whole child, his heart and his will must be reached, as well as the mind.

找到一颗类似地球的行星的可能性，正是推动我们进行系外行星研究的热情所在。