1.三倍 triple
他使自己的收入增至三倍。
He tripled his income.
2.三隻手 pickpocket
The man in black on the bus is a pickpocket.
3.三級風 gentle breeze
我認為三級風不強烈，反倒很舒服。
Gentle breeze is not strong， but very comfortable， I think.
4.三角褲 brief
我的平角褲小了，想買幾條三角褲。
My pants are small now， I want to buy some brief.
5. 三長兩短 unexpected misfortune
我的兒子要是有個三長兩短，我就不想活了。
Any unexpected misfortune happened to my son， I would not live any longer.
6.三次方程 cubic equation
我必須解出這道三次方程。
I must work out the cubic equation.
7.三番五次 again and again
這個話題我已經三番五次地說過，我不想再說了。
I have talked about the topic again and again， so I don‘t want to speak it any more.
8.三令五申 repeated injunctions
你們必須都知道，三令五申的法令要遵守。
All of you must know that the repeated injunctions must be obeyed.
9.三心二意 be of two minds
今天早上吉姆上課時三心二意，心不在焉。
Jim was of two minds in class this morning.
10.三言兩語 in a few words
李先生三言兩語解釋了整個事件，記者對他的回答不滿意。
Mr. Lee explained the whole thing in a few words， and reporters were not satisfied with his answer.
11.三角戀愛 love triangle
湯姆和瑪麗正處於三角戀愛之中，他們各自有家，這很危險。
Tom and Mary are in love triangle， and they have their own families. It‘s very dangerous.
12.三下五除二 meat and quick
乾的漂亮，這項工作三下五除二就完成了。
Well done， the job was finished in neat and quick.
13.三思而後行 look before you leap
不管你想做什麼事，請三思而後行。
No matter what you want to do， please look before you leap.
14.三點式游泳衣 bikini suit
瑪麗喜歡穿三點式游泳衣游泳。
Mary likes swimming in bikini suit.
15.三寸不爛之舌 have a silver tongue
湯姆會用他三寸不爛之舌說服約翰放棄他的瘋狂計劃。
Tom has a silver tongue， and he can persuade John to give up his crazy plan.
