"Understanding the immune system is understanding the key to unlocking new cancer therapies."

解释：道理和事情既没有永远正确的，也没有永远是错误的。

All mankind... being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.

摄影还不够好，还不够激进。

数学证明是用逻辑语言写成的诗。

艺术最美妙的地方在于它可以不用语言交流。