It is the tears of the earth that keep her smiles in bloom。
The earth's resources are finite, but human ingenuity is not.
船舶自动转向的引入是一个具有重大实际意义的问题,其解决需要开发一种新型控制器。
The Langlands program is a reflection of the unity of mathematical thought.
文字的力量是巨大的,但它也是脆弱的,容易被滥用。