求助于的英文：
by recourse to
fall back on
Go To
have recourse to
have resort to
make a recourse to
make one's appeal to
recourse to
refer oneself to
repair to
resort to
turn to

参考例句：

demand something;Make demands
求助于

Fall back on old friends in time of need.
在需要时求助于老朋友们

(fml)Rarely did she request help but this was a matter of urgency.
她很少求助于人,这事却是十分紧急.

It is wrong to fall back on lies.
求助于谎言是错误的。

Turn to; look to
求助于;着手;从事;趋于

Turn to
变成;求助于,借助于

New means must of necessity be had recourse to.
人们必然求助于新方法。

A lion may come to be beholden to a mouse
强者亦有求助于弱者的时候

The Red Cross appeals to philanthropy
红十字诉诸(求助于)人类的善心。

We will appeal to a great variety of sources of information.
我们将求助于多种资料来源。

recourse是什么意思：
n. 所依靠的物或人；追索权；依靠；求助；诉诸

His only recourse was the police.
他唯一的求助对象是警察。

Do we have any recourse?
我们有任何求助的对象吗？

The states had no recourse but to await the verdict of the high tribunal.
各州没有追索权，只能坐待高级法院的判决。

fall是什么意思：
v. 落下；倒塌；摔倒；下降；减弱；阵亡
n. 摔倒；下降；秋天；垮台；陷落；瀑布
adj. 秋天的

Sleet is falling.
天上下起了冰雹。

fall into disfavour
失宠失众望

We observed the barometer fall. [The barometer was observed to fall.]
我们看见晴雨表下降。

back是什么意思：
n. 后面，背面，反面；背，背部；靠背；后卫
v. 支持；后退，倒退；背书；下赌注于
adj. 背部的；后面的；过去的；拖欠的.
adv. 以前；向后地；来回地；上溯

Stand back to back!
背靠背站好！

They are on the back of the menu.
它们在菜单背面。

Our seats on the train were back to back.
我们在火车上的坐位是背靠背的。