要求：1）人和人，人和动物都能产生友谊；
2）朋友能提供精神上和物质上的帮助；
3）朋友有好坏之分，友谊也有真假之别。
参考词汇：精神的 spiritual ; 物质的 physical; 真朋友 true friend; 假朋友 false friend.
Friendship
Friendship is a very important part in people's life. There are many different kinds of friendship. Not only can humans provide friendship for each other, but also animals sometimes show their frien
