Diligence is the mother of success.勤奋是成功之母。
Christmas comes but once a year.圣诞一年只一度。
Diligence is the mother of good fortune.勤勉是好运之母。
Deliberate slowly,执行 promptly.慢慢酌量，快快行动。
Dexterity comes by experience.熟练来自经验。
Do as most men do and men will speak well of thee.照大多数人那样干，人们会把你称赞。
Doubt is the key of knowledge.怀疑是知识之钥。励志名言
Every tide has its ebb.潮涨必有潮落时。
Everybody’s business is nobody’s business.众人的事就是无人过问的事。
Do business, but be not a slave to it.要做事，但不要做事务的奴隶。