睡眠不是奢侈品，而是大腦的必需品。
The concept of law is a complex one, and it is not easy to define.
作家必須是世界的敏銳觀察者和心靈的深刻思考者。
The charm of mystery novels lies not only in solving puzzles but also in the profound analysis of human nature.
"Behavior cannot be divorced from its adaptive context."
我們最甜美的歌是那些講述最悲傷思想的歌。
We must listen to our consumers, but also educate them about the realities of dairy production.