Both seem somewhat nervous - he with his left arm crossing his body and fingers slightly rounded in a closed position - and her with her left hand elevated as if to keep harm at bay.

两个人看起来似乎都有些紧张——他将左手微微放到身体前方，手指轻轻地握紧——而她则将左手高高抬起，似乎在控制自己的情绪。

youdao

You must keep the left arm absolutely straight and do not move your head at all.

你必须保证左手绝对伸直，并且头一点也不能动。

youdao

He also had a tail, but Lucy did not notice this at first because it was neatly caught up over the arm that held the umbrella so as to keep it from trailing in the snow.

他还有一条尾巴，但露茜最初并没有看见。因为怕拖在雪地里搞脏，他把它放在拿伞的那个手臂弯里。

youdao

He decided to have his arm set at an angle so that he could keep playing the guitar.

VOA: special.2009.09.27

The more uncertainty there is, the more each woman is likely to keep the other at arm's length.

WSJ: Getting Along With the Original Other Woman��Your Mother-in-Law

"There was a very concerted attempt not to play this game, to keep the media at arm's length, " he told BBC Two's Newsnight.

BBC: Nothing personal: Politicians and their media friends

But what is equally clear is that the US wants to keep its involvement at arm's length, refusing to provide weapons directly and keeping a low-profile.

BBC: Analysis: US Syria strategy aims to salvage reputation