Deliberate in counsel, prompt in action.
［译］考虑要仔细，行动要迅速。
Deliberating is not delaying.
［注解］deliberating深思熟虑。
［译］慎思不是拖延；磨刀不误砍柴工。
Deliver not your words by number but by weight.
［译］言不在多，而在有物。
Discretion is the better part of valour.
［注解］语出莎士比亚的戏剧《亨利四世·上篇》第5幕第4场。常用做诙谐语，作为不做无谓冒险的借口；胆小鬼也以此掩饰自己的胆怯。意为小心则大勇。
［译］谨慎为勇敢之本；真勇士不轻易冒险。
Do as you would be done by.
［注解］指你愿意别人如何对待你，你就应该如何对待别人。
［译］推己及人。
Do not cut down the tree that gives you shade.
［注解］比喻不要忘恩负义。
［译］遮阴之树不可砍。
Do not give a dog bread every time he wags his tail.
［译］不要有求必应。
Do not kick against the pricks.
［译］勿踢刺棍；勿以卵击石。
Do not praise a day before sunset.
［译］切勿褒贬过早。
Don't cut off your nose to spite your face.
［注解］spite恶意对待。此谚语用来劝人不要意气行事，以免自身受到损害。切勿割掉自己的鼻子去报复自己的脸；不要因意气行事而伤害自己。意同“Don't cut the bough you are standing on”。
［译］勿轻举妄动，自断生路。
Don't halloo till you are out of the wood.
［注解］halloo意同whistle。茂密的森林容易迷路，未出林子前始终存在危险和困难。out of the wood已成习语，意为走出森林，脱离危险，到达安全地。
［译］未出险境，切莫先欢呼。
Don't have too many irons in the fire.
［译］不要揽事过多，操之过急。
Don't make a mountain out of a molehill.
［译］勿小题大作。
Don't make a rod for your own back.
［译］勿自讨苦吃。
Don't make much ado about nothing.
［注解］出自伊索寓言《大山临产》。
［译］庸人多自扰。
Don't mend what ain't broken.
［译］勿画蛇添足。
Don't put all your eggs in one basket.
［注解］put all your eggs in one basket指集中财力干一件事情；把一切希望寄托在一件事情上，孤注一掷。此谚语用来劝人做事要留余地，不可孤注一掷，对某件事不可期望过高。
［译］不要把蛋全放在一个篮子里；勿孤注一掷。
Don't put the cart before the horse.
［译］不要本末倒置。
Don't rob Peter to pay Paul.
［译］不要挖肉补疮。
Don't try to teach your grandmother to suck eggs.
［注解］suck eggs吮鸡蛋。在鸡蛋两头各钻一个小孔，然后吮其中的一头。祖母肯定懂得，所以无需教她这么干。比喻能人面前莫逞能。
［译］不要班门弄斧，孔门卖文。
Don't wash your dirty linen in public.
［译］家丑不可外扬。
Draw not your bow till your arrow is fixed.
［译］事未齐备，切莫妄动。