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a gentleman acts on behalf of an understanding friend, as a woman makes herself beautiful for her lover.
士为知女为悦己者容。
a brother may not be a friend, but a friend will always be a brother.
兄弟不一定是朋友, 友一定是兄弟。
friendship is almost always the union of a part of one mind with a part of another; people are friends in spots.
是两者思想的结合, 志趣相投才能成为朋友。
be true to your word, your work, and your friend.
人应遵守诺言，忠实自己的工作和友人。
i know not whether our names will be immortal; i am sure our friendship will.
我不知道我们的名字能否永垂不朽；我敢说我们的友谊会与世长存。