It is not unlikely, but that there may be yet invented several other helps for the eye, as much exceeding those already found, as those do the bare eye.

可持续性不是一种趋势，而是我们对后代的责任。

世界上充满了神奇的事物，耐心地等待着我们的感官变得更加敏锐。

文学是问题减去答案。

可持续发展不再是选择，而是生存的必需。

他们之间的沉默很沉重，充满了未说出口的话和未解决的情感。

领导力不在于掌控，而在于关心那些你负责的人。

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