arm in arm

(of two or more people) with arms linked

（兩人或多人）臂挽臂地

as long as one’s (或 someone's) arm

(informal)very long

(非正式)很長，十分長

I have a list of vices as long as your arm.

我的惡習一大堆。

beyond arm's reach

I have a list of vices as long as your arm.

我的惡習一大堆。

cost an arm and a leg

(informal)be extremely expensive

(非正式)十分昂貴的

give one's right arm

(informal)used to convey how much one would like to have or do something

(非正式)付出極大的代價

I'd give my right arm to go with them.

為了和他們一起去，我愿付出極大代價。

in arms

(of a baby) too young to walk

（嬰兒）只能抱在懷里，太小不會走路

a babe in arms.

還抱在懷里的小孩。

into the arms of

into the arms of into the possession or control of

被…擁有，受…控制

the violin passed into the arms of a wealthy dilettante.

那把小提琴落到了一個對音樂一知半解的有錢人手里。

keep someone/thing at arm's length

avoid intimacy or close contact with someone or something

避免與（人，物）親近（或接近）

the long (或 strong) arm of

the far-reaching power, authority, or influence of

深遠的威力（權(quán)力或影響）

the long arm of the law caught up with him.

他終于難逃法網(wǎng)。

put the arm on

(N. Amer. informal)attempt to force or coerce (someone) to do something

(北美， 非正式)強迫，迫使，脅迫

she started putting the arm on them for donations.

她開始強迫他們捐錢。

under one's arm

between one's arm and one's body

在腋下

Meryl tucked the papers under her arm.

梅里爾把文件夾在腋下。

within (或 beyond) arm's reach

near (or not near) enough to reach by extending one's arm

伸手可及（或不可及）的

an arm and a leg&I{【俚語】}

An excessively high price

非常高的價格

a cruise that cost an arm and a leg.

要花去好多錢的航行

at arm's length

At such a distance that physical or social contact is discouraged

保持距離：以這樣一個距離不鼓勵身體的或社交的接觸

kept the newcomer at arm's length at first.

一開始對新來的人保持一定距離