在一个人口过度拥挤的世界里,人们不太愿意接受他人的多样性,更容易将他人视为对自身身份的威胁。
"There is no substitute for books in the life of a child."
The human mind is so complex and things are so tangled up with each other that, to explain a blade of grass, one would have to make a diagram of the universe.