释义：世间万物的发展变化都由命运决定，人力难以控制分毫。
The beauty of biology lies in its complexity and the elegance of its solutions.
The more we learn about the true nature of animals, the more we realize how much we have in common with them.
Legal obligations are not merely moral obligations backed by sanctions.
Quality is not a chance; it is a choice.
It is not shame for a man to learn that which he knows not，whatever his age.