免疫系统是抗击癌症的关键。
"The immune system is the key to fighting cancer."
The most exciting moments in mathematics are when you realize that two seemingly unrelated areas are deeply connected.
下一次工业革命将由我们如何管理资源来定义。
If the highest aim of a captain were to preserve his ship， he would keep it in port forever.
The challenge in learning is not just to memorize, but to generalize from specific examples to broader concepts.
The first duty of the sovereign， that of protecting the society from the violence and invasion of other independent societies， can be performed only by means of a military force.