1、A gentleman acts on behalf of an understanding friend, as a woman makes herself beautiful for her lover.
士为知己者用，女为悦己者容。
2、A brother may not be a friend, but a friend will always be a brother.
兄弟不一定是朋友, 而朋友一定是兄弟。
3、Friendship is almost always the union of a part of one mind with a part of another; people are friends in spots.
友谊是两者思想的结合, 志趣相投才能成为朋友。
4、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。
5、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。
6、The true friendship seeks to give, not take; to help, not to be helped; to minister, not to be ministered unto.
真正的友谊追求的是给予，而不是索取； 是帮助别人，而不是被人帮助；是为人服务，而不是被人服务。
7、To prepare a friend, three things are required: to honor him present, praise him absent, and assist him in his necessities.
维护朋友，有三件事情要做到：当面要尊重他，不在场时要表扬他， 苦难时要帮助他。
8、Choose thy friends like thy books, few but choice.
选择朋友要像选书那样， 数量要少，但质量要精。
9、My friend is not perfect—nor am I—and so we suit each other admirably.
朋友不会十全十美，你自己也一样，双方要互相尊敬。
10、For a congenial friend a thousand toasts are too few; in a disagreeable conversation one word more is too many.
酒逢知己千杯少，话不投机半句多。
参考资料：
1、Friends must part.
天下无不散之筵席。
2、A trouble shared is a trouble halved。
两人分担，困难减半。
3、He is a good friend that speaks well of us behind our backs.
背后说好话，才是真朋友。
4、A friend is easier lost than found。
朋友易失不易得。
5、A friend in need is a friend indeed.
患难朋友才是真朋友。
6、A friend without faults will never be found.
没有缺点的朋友是永远找不到的.
7、Let's wish our friendship forever.
让我们一起祝愿友谊地久天长。
8、Life without a friend is death without a witness.
在世无朋友，死后无证人。
9、He is rich enough who has true friends.
有真朋友的人是富翁。
10、Have but few friends though many acquaintances.
结交可广,知己宜少。
扩展资料：
关于朋友的俗语
11、Friends may meet, but mountains never greet.
朋友可相逢，高山永分离。
12、Friendship ---- one soul in two bodies.
友谊是两人一条心。
13、Friendship is love with understanding.
友谊是爱加上谅解。
14、Everything is good when new, but friend when old.
物莫如新,友莫如故。
15、Friends are like fiddle-strings, they must not be screwed too tight.
朋友像琴弦，不能拧太紧。
16、Better an open enemy than a false friend.
明枪易躲,暗箭难防。
17、A true friend is known in the day of adversity.
疾风知劲草,患难知友情。
18、A good friend is my nearest relation.
良友如近亲
19、A friend is never known till a man have need.
需要之时方知友。
20、A friend is a second self.
朋友是另一个我。
本回答被网友采纳A friend in need is a friend indeed. 患难朋友才是真朋友。
A friend is a second self. 朋友是另一个我。
A friend is best found in adversity. 患难见真友。
A friend is never known till a man have need. 不到患难时，永远不能认识真正的朋友。
A friend is not so soon gotten as lost. 交友慢，失友快。
A friend to everybody is a friend to nobody. 广交友，无深交。
A friend without faults will never be found. 没有缺点的朋友是永远找不到的。本回答被网友采纳
2.No news is good news.没有消息就是好消息
3.The early bird catches the worm.早起的鸟儿有虫吃。（捷足先登。）
4.Always prepare for a rainy day.未雨绸缪
5.He laugh best who laughs last.笑到最后，笑得最好
6.Live and learn.活到老，学到老。Obedience is the first duty of a soldier军人以服从命令为天职。
Observation is the best teacher.观察是最好的老师。
Offense is the best defense.进攻是最好的防御。
Old friends and old wines are best.陈酒味醇，老友情深。
Old sin makes new shame.一失足成千古恨。
Once a man and twice a child.一次老，两次小。
Once a thief, always a thief.偷盗一次，做贼一世。
Once bitten, twice shy.一朝被蛇咬，十年怕井绳。
One boy is a boy, two boys half a boy, three boys no boy.
一个和尚挑水喝，两个和尚抬水喝，三个和尚没水喝。
One cannot put back the clock.时钟不能倒转。
One eyewitness is better than ten hearsays.百闻不如一见。
One false move may lose the game.一着不慎，满盘皆输。
One good turn deserves another.行善积德。
One hour today is worth two tomorrow.争分夺秒效率高。
One man‘s fault is other man‘s lesson.前车之鉴。
One never loses anything by politeness.讲礼貌不吃亏。
One swallow does not make a summ一燕不成夏。
One‘s words reflect one‘s thinking.言为心声。
Out of debt, out of danger.无债一身轻。
Out of office, out of danger.无官一身轻。
Out of sight, out of mind.眼不见，心为静。
Patience is the best remedy.忍耐是良药。
My friend is not perfect---nor am I ---and so we suit each other admirably.(朋友不会十全十美,你自己也一样,双方要互相尊敬.)
For a congenial friend a thousand toasts are too few;in a disagreeable conversation one word more is too many.(酒逢知己千杯少,话不投机半句多.)
To prepare a friend,three things are required : to honour him present,praise him absent,and assist him in his necessarities.(维护朋友,有三件事情要做到:当面要尊重他,不在场时要表扬他,苦难时要帮助他.)
A bosom friend afar brings a distant land near.(海内存知己,天涯若比邻.)
Between friends all is common. (朋友之间不分彼此.)
A friend is easier lost than found. （得朋友难，失朋友易.） A friend is never known till a man has need. (需要之时方知友.) A friend without faults will never be found. （没有十全十美的朋友.）
You shall judge a man by his foes as well as by his friends.（你可以通过一个人的朋友，也可以通过一个人的敌人来判断他的为人.）