张三李四
every Tom, Dick, and Harry
It is not a smart idea to admit every Tom, Dick, and Harry to the party.
　
甜言蜜语；恭维奉承
sweet talk
She uses sweet talk to get her way.
　
情人眼里出西施
beauty is in the eye of the beholder; love is blind
You should remember, my dear, that beauty is in the eye of the beholder.
　
欲速则不达
more haste, less speed
"More haste, less speed," as the saying goes.
　
聊胜于无
half a loaf is better than none (or no bread)
The fund is not enough, but half a loaf is better than none.
　
捷足先登
the race is to the swift
I returned, and saw under the sun that the race is not to the swift, nor the battle to the strong. (我又转念，见日光之下，快跑的未必能赢，力战的未必得胜 -- 语出圣经)
　
敝帚自珍；言过其实
all his geese are swans
We all know John always says that all his geese are swans.
　
杀鸡取卵；断绝财路
kill the goose that lays the golden eggs
They sold part of their business but it was the most profitable part. I think that they have killed the goose that lays the golden eggs.
　
杀鸡用牛刀；小题大作
break the butterfly on a/the wheel; take a sledgehammer to crack/break a walnut/nut
He's a person who usually breaks the butterfly on the wheel.
　
得寸进尺
give him an inch and he will take a mile/yard
He's such a person that you give him an inch and he will take a mile.
　
得意洋洋
walk/tread on air
Susan has been walking on air ever since she got the official letter that she's been accepted as a graduate student at the University of California.
　
患难见真情
a friend in need is a friend indeed
You came to my side when I was in trouble. A friend in need is a friend indeed.
　
动人心弦；扣人心弦
pull/tug at/on the/one's heartstrings
The book about the romance  between a young lady and an old man was one that really pulled at the heartstrings.
　
众擎易举；人多好办事
many hands make light work
We need a few more volunteers to move the furniture -- many hands make light work, you know.
　
盛气凌人；作威作福；摆架子
give oneself airs; lord it over
Because he has two big houses, he is always giving himself airs.
After Mary was elected president, she tried to lord it over the other girls.
　
毕恭毕敬；卑躬屈膝
bow and scrape; cap/hat in hand
In this fashionable store, the salespersons virtually bow and scrape before customers.
They went to her, hat in hand, asking for a change of assignment.
　
从容不迫；不慌不忙
take one's time
You can take your time altering that dress; I don't need it right away.
　
鱼米之乡
a land of milk and honey
Taiwan is a land of milk and honey.