英语口语：★Dogs that run after many hares kill none.
★Doing is better than saying.
★Do not despise your enemy.
★Do not praise a day before sunset.
★Don’t fly till your wings are feathered.
★Don’t put off till tomorrow what should be done today.
★Don’t speak all you know, but know all you speak.
★Don’t trouble trouble until trouble troubles you.
★Don’t waste life in doubts and fears.
★Doubt is the key of knowledge.
★You may know by a handful the whole sack.
★Do what conscience says is right.
★Downy lips make thoughtless slips.
★God never shuts one door but he opens another.