The PAC learning framework provides a formal way to quantify the learnability of a concept class.

Sustainable forestry is not an option; it's our responsibility.

The bond market is the most important market in the world.

男人是奇怪的东西，而更奇怪的是女人。

随着我们的进步，基因编辑的伦理影响必须被慎重考虑。

志存高远，脚踏实地，立即行动。