arm in arm

(of two or more people) with arms linked

（两人或多人）臂挽臂地

as long as one’s (或 someone's) arm

(informal)very long

(非正式)很长，十分长

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

我的恶习一大堆。

beyond arm's reach

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

我的恶习一大堆。

cost an arm and a leg

(informal)be extremely expensive

(非正式)十分昂贵的

give one's right arm

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

(非正式)付出极大的代价

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

为了和他们一起去，我愿付出极大代价。

in arms

(of a baby) too young to walk

（婴儿）只能抱在怀里，太小不会走路

a babe in arms.

还抱在怀里的小孩。

into the arms of

into the arms of into the possession or control of

被…拥有，受…控制

the violin passed into the arms of a wealthy dilettante.

那把小提琴落到了一个对音乐一知半解的有钱人手里。

keep someone/thing at arm's length

avoid intimacy or close contact with someone or something

避免与（人，物）亲近（或接近）

the long (或 strong) arm of

the far-reaching power, authority, or influence of

深远的威力（权力或影响）

the long arm of the law caught up with him.

他终于难逃法网。

put the arm on

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

(北美， 非正式)强迫，迫使，胁迫

she started putting the arm on them for donations.

她开始强迫他们捐钱。

under one's arm

between one's arm and one's body

在腋下

Meryl tucked the papers under her arm.

梅里尔把文件夹在腋下。

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{【俚语】}

An excessively high price

非常高的价格

a cruise that cost an arm and a leg.

要花去好多钱的航行

at arm's length

At such a distance that physical or social contact is discouraged

保持距离：以这样一个距离不鼓励身体的或社交的接触

kept the newcomer at arm's length at first.

一开始对新来的人保持一定距离