1.have an ace in the hole
握有王牌,很有把握
When you have the ace in your hand,you have something which you can use to gain an advantage when you need it.
have an ace in the hole(American)

2.a class act
（在运动或演艺方面）很出色的人
I have been tracking Neil for a year,he is a class act and I have got a lot respect for his ability.
我已跟踪尼尔一年，他是个出色的家伙，我很崇拜他的能力。

3.break one"s back
努力地工作
When you"re breaking your back to make an enterprise work,it"s going to cut into your time with family.
当你全身心投入工作的时候，会侵占到家庭生活的时间。

4.get someone"s back up
激怒某人
What does get my back up is a girlfriend who gets too jealous if someone else finds me attractive.

5.hat in hand
求助，乞讨
He ended up going hat in hand to the neighbours.
他沦落到向邻居乞讨。

6.in the cards
可能发生
He believes an invasion was never in the cards.
他相信入侵永不会发生。

7.a change of heart
态度的改变

8.get no change out of someone
从某人处没有得到任何帮助
You won"t get any change out of him,so don"t expect it .
你不会从他那儿得到任何帮助，别指望了。

9.chapter and verse
所有细节
The instruction gives you chapter and verse
使用说明给出了所有细节。

10.cut to the chase
言归正传
He talked about the need to see all points of view,then he cut to the chase.

11.cut a dash
（外表）给人留下深刻印象
Tania cut a daring dash with a dress slashed almost to the waist .

12.in the dark
一无所知；蒙在鼓里
keep somebody in the dark
不让某人知道

13.out of one"s depth
力所不能及
He felt out of his depth on a diploma course.

14.get one"s just deserts
活该

15.die like a dog
凄苦地死去（古）

16.every dog has its day
风水轮流转

17.It"s a dog"s life
（抱怨生活或工作不如意）

18.in the doghouse
四面楚歌
Insurance companies are already in the doghouse over poor advice on pensions which has left hundreds of thousands of people worse off.

19.do the donkey work
做乏味的工作

20.do something like a dream
做的很出色
The first stages of installation worked like a dream.

21.all dressed up with nowhere to go
准备充分，但没机会去做
If funding dries up ,the opera houses will be all dressed up ,but with nowhere to go .

22.do something at the drop of a hat
卤莽行事

23.a drop in the ocean/bucket
微不足道，沧海一粟
The size of the grants have been attacked by groups as merely a drop in the ocean.

24.be all ears
洗耳恭听
Now you can say ,I am all ears.

25.down to earth
现实，实际
He is blunt,outspoken,practical and down to earth.