Don't put the cart before the horse. 
不要把车套在马前头. /不要本末倒置. 

Don't regret about your past as it's useless, but prevent the same mistakes in the future. 
往者不可谏 ,来者犹可追.  英汉谚语 

Don't run with the hare and hunt with the hounds¹. 
不要既陪野兔奔跑，又随猎狗追捕.  英语谚语 

Don't teach your grandmother to suck eggs. 
不要班门弄斧.  英语谚语

Don't tell me how hard you work. Tell me how much you get done. 
不必告诉我你多么勤奋,只要告诉我你做了多少事. 

Don't throw out the baby with the bath water. 
不要将小孩与洗澡水一起倒掉. 

Don't trouble trouble till trouble troubles you. 
麻烦没有来找你，不要去找麻烦.
 
Don't waste life in doubts and fears. 
不要把生命浪费于怀疑与恐惧中.  Emerson 爱默生
 
Don't waste your precious time, for youth, once spent, will never come again. /Seize the day, for fleeting² youth never returns. 
光阴勿虚度,青春不再来.

Doubt is the key of knowledge. 
怀疑是知识的钥匙.

Drawn³ wells are seldom dry.
水井常用不枯竭. 

Drift is as bad as unthrift. 
花钱凭冲动,等于无底洞.
 
Dry bread at home is better than roast meat abroad. 
在外吃烤肉不如在家啃面包.

Each man is the architect of his own fate.
每个人都是自己命运的建筑师
 A.Claudius 克劳笛乌斯
 
Each of us is the accumulation of our memories.
我们每个人都是我们记忆的累积
 Alan Loy McGinnis 艾伦·洛尹·麦金尼斯
 
Early sow, early mow⁴.
种得早 ,收得早
 
Early start makes easy stages.
早动身 ,易从容,早开始,早成功
 
Early to bed and early to rise, Makes a man healthy, wealthy and Wise.
睡得早，起得早，富裕，聪明，身体好
 
East is East and West is West, and never the twain shall meet.
东是东来西是西，两者永远要分离
 R.Kipling 吉卜林(英国诗人)
 
East or West, home is best.
无论在何处 ,家园最美好
 
Easy and success are fellows.
从容与成功是伙伴
 
Easy come, easy go.
来得容易去得 . /悖入悖出 （英语谚语）
 
Eat at pleasure, drink with measure.
随意吃饭，适度饮酒

Eating and scratching wants but a beginning.
吃饭和搔痒只需开个头（英语谚语）
 
Economy is itself a great income.
节约本身就是一大笔收入 
 
Economy is the art of making the most of life.
节约是把生活尽量巧安排的艺术
 
Education begins a gentleman, conversation completes him.
培养一个人，教育打基础，完美靠交谈
 
Education is a progressive discovery of our own ignorance⁵.
教育是一个逐步发现自己无知的过程
W.Durant 杜兰特(美国历史学家、散文家)
 
Education makes a people easy to lead, but difficult to drive; easy to govern but impossible to slave.
教育使一个国家的人民容易领导，但是难于驱使；容易治理，却不可以奴役。
H.P.Brougham 布罗厄姆(英国政治家)
 
Egotists do not see the world with themselves in it, but see themselves with the world around them.
自高自大的人看到的不是自己存在于这个世界上，而是世界围绕着他们而存在
H.L.Samuel 塞缪尔