Discontent is the first step in progress.不知足是前进中的第一步.

Discretion¹ is the better part of valour.小心即大勇.

Disease of the soul are more dangerous than those of the body.心灵上的疾病比肉体上的疾病更危险.

Disease, enemy, and debt --these three must be cut off as soon as they begin to grow.病，仇与债这三者，一露苗头就砍掉.

Diseases are the price of ill pleasures.疾病是不正当娱乐的代价.

Diseases come on horseback, but go away on foot.病来如山倒，病去如抽丝.

Disgraced may be he who thinks ill.心怀不端的人是可耻的.

Do as I say, not as I do. 照我说的做，别照我做的做。

Do as most men do and men will speak well of thee.为众之所为，受众之所夸.

Do as the Romans do.入乡要随俗.

Do as you would be done by.推己及人.

Do business, but be not a slave to it.要做事，但不要做事务的奴隶.

Do in Rome as the Romans do.入乡随俗.

Do it now.机不可失，时不再来。

Do no through fear of poverty surrender liberty.不要因为怕贫苦而放弃自由.

Do not all you can, spend not all you have; believe not all you hear; and tell not all you know.不要为所能为，不要花尽所有，不要全信所闻，不要言尽所知.

Do not cut down the tree that gives you shade.不要忘恩负义.

Do not despise your enemy.万勿轻敌.

Do not give a dog bread every time he wags his tail.不要有求必应.

Do not praise a day before sunset.切勿褒贬过早.

Do not run too fast after gain.不要见利就拼命追.

Do not speak of your happiness to one less fortunate than yourself.不要向不如你幸运的人述说你的幸福.

Do not swap² horses when crossing a stream.处在危难中，不宜大更动.

Do not to others what you do not wish them to do to you.己所不欲，勿施于人.

Do not wash dirty linen³ in public.家丑不可外扬.

Do nothing by halves.凡事不可半途而废。

Do one's level best.尽力而为.