物理学和数学之间的界限并不像人们想象的那么清晰。
释义:求学之人若不勤奋,必然是其志向不坚定。
The truth is a slippery thing, especially in the dark.
The best way to predict the future is to create it.
There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false. A thing is not necessarily either true or false; it can be both true and false.