"Children are the best critics because they are honest and direct."
The discovery of DNA structure was like unraveling a very complex puzzle.
牛、猪、战争和巫术并非任意的文化偏好,而是对物质条件的适应。
我不是男孩,但还不是男人。
The greatest discovery of my generation is that a human being can alter his life by altering his attitudes.