Yesterday is dead, forget it; tomorrow does not exist, don't worry; today is here, use it.    昨天已經消逝，把它忘掉；明天還未來到，不必煩惱；今天就在眼前，把它用好.
Yesterday will not be called again.    光陰一去不復返.
You (or One) cannot make a silk purse out of a sow's ear.    粗瓷碗雕不出細花來.
You are the greatest enemy if you are a coward, but if you are brave, you are your greatest friend.    如果你是膽小鬼，你就是自己最大的敵人；如果你是勇敢者，你就是自己最好的朋友.
You can do more than strike while the iron is hot; you can make the iron hot by striking.    鐵熱時，你能做的不止是錘打，而錘打可使鐵熱.
You can fool some of the people all the time, and all of the people some of the time; but you can't fool all of the people all the time.    你可以一直愚弄一些人，甚至可以在某個時期愚弄所有的人；但不能一直愚弄所有的人.
You can take a horse to the water but you cannot make him drink.    馬到河邊不喝水，逼馬低頭亦枉然.
You cannot burn the candle at both ends.    蠟燭不能兩頭點，精力不可過分耗。
You cannot clap with one hand.    孤掌難鳴.
You cannot eat your cake and have it.    魚與熊掌，不可得兼。
You cannot flay the same ox twice.    一頭牛不能剝兩次皮.
You cannot have two forenoons in the same day.    一日之中不可能有兩個上午.
You cannot have your cake and eat it.    你不能又要留餅，又要吃它。
You cannot judge a tree by its bark.    人不可貌相.
You cannot make a crab walk straight.    江山易改，本性難移.
"You cannot put old heads on young shoulders.
"    "少年老成，勢必難解。
"
You cannot sell the cow and sup the milk.    你不可能出售乳牛，同時又要喝牛奶.
You can't eat your cake and have it.    不能既要吃餅，又要把餅保存.
You can't make bricks without straw.    沒有稻草，制磚難搞.
You can't make omelets (or omeletts) without breaking eggs.    有失才有得.
You have no goats, and yet you sell kids.    你雖無老山羊，卻出賣小山羊.
You make the failure complete when you stop strying.    不再努力之時，就是完全失敗之日.
You may force a man to shut his eyes, but you cannot make him sleep.    你可以迫人閉眼，但不能使他睡覺.
You may go farther and fare worse.    一動不如一靜.
You may know by a handful the whole sack.    由一斑可知全貌。
You may know the horse by his harness.    欲知馬如何，可看套馬索.
You must not pledge your own health.    切不可把健康作孤注一擲.
You must reap what you have sown.    種瓜得瓜，種豆得豆.
You never know what you can do till you try.    事非經過不知難.
You never know what you can till you try.    是驢子是馬，拉出來遛遛。
You never know your luck.    命運好壞不由己。
You roll my log and I'll roll yours.    互相吹噓.
You should, like a candle, burn yourself out to give light to others.    要象蠟燭一樣燃燒自己，照亮別人。
You'd better wise up.    你最好放聰明點.
Young man may die but old men must die.    年輕人可能會死，老年人難免不亡.
Youth is a blunder; manhood a struggle, old age a regret.    青年冒失莽撞；成年發奮圖強；老年遺憾懊喪.
Youth is life's seed-time.    青年時代是人生的播種期.
Youth is the season of hope, enterprise, and energy, to a nation as well as an individual.    青年時期對國家和個人都是希望、創業和精力充沛的時期.
Youth looks forward and age backward.    青年人向前看，老年人向后看.
Zeal without knowledge is a runaway horse.    缺乏知識之熱誠猶如脫韁之馬。
Zeal without knowledge is fire without light.    有熱情而無知識，猶如有火焰而無光芒.