求10分钟左右有关“俚语”的大学英语演讲稿,美国,英国的都可以,有中文的更好.

求10分钟左右有关“俚语”的大学英语演讲稿,美国,英国的都可以,有中文的更好.
发到wjzage@163.com。可以介绍三到四个俚语，然后说说其中的故事，其中一个结合自己经历。用一些简单的词汇就行，有类似范文也不甚感激，若成功，愿加倍追分。

Be in the air 将要发生的事情
The feeling or idea that something new
is about to happen or is going to change
Example:From the
arguments going on at the meeting,it seems that a change in policy is in the
air.
Clear the air
消除误会
To settle a dispute and restore good relations
Example:We had a meeting with the workers,and I think we've
cleared the air now.
Cost an arm and a leg 极其昂贵
To be very
expensive
Example:I love that fur coat.However,I don't
think I'm going to buy it because it costs an arm and a leg.
A bad egg 缺乏道德的人
Somebody who has no moral principles and should be avoided
Example:You mustn't lend Tim money,he's a bad egg.You'll
never see him or your money again!
In the Bag 稳操胜券
Said of an achievement
which is secure
Example:We have the deal in the bag.The
client came in this morning to sign the agreement.
In the balance 未知的,不可预测的
Said when the outcome of a situation is unknown or
unpredictable
Example:His career as a pilot is in the
balance,as his eyesight does not seem good enough.
Drive a hard bargain 极力讨价还价
To have the negotiating strength and skills to get the most
advantageous price and conditions
Example:Amanda is
negotiating the best price from the suppliers.She drives a hard bargain.
Ring a bell
看上去或听起来非常熟悉
To look,sound or seem familiar
Example:That face rings a bell,where have I seen him
before?
Tighten
one's belt 节衣缩食
To cut down on spending because there is
less income than before
Example:Now you are out of work,
you'll have to tighten your belt and give up buying new clothes and going out so
often.
Kill two
birds with one stone 一石二鸟
To complete two tasks together,
with less effort than doing them separately
Example:Since
I'd gone to the store to buy some bread,I thought of killing two birds with one
stone and invited Mr.Biggs to the party