“力不从心”英文怎么说？

力不从心”是指心里想做，
但力量或能力办不到。
可以翻译为“one’s ability falling short of one's wishes，
或be unable to do what one would like to do”。
那么你知道“力不从心”用英语怎么说？

●力不从心 be out of one's depth

(1) out of one's depth “感觉超出本身的能力，
无法驾驭，无法胜任，力不从心”
英语解释为to be involved in a situation or activity that is too difficult for you to understand or deal with。
(2) be out of one's depth at sth. “......超出本身能力，对......力不从心”
例
I thought you might be a little out of your depth there.
我觉得那案子你会有点力不从心。
When the police are out of their depth,
which is always, they consult me.
警察力不从心时，这事常常发生，
就会来咨询我。《神探夏洛克》

●小菜一碟 a piece of cake

a piece of cake基本义“一块蛋糕”，引申义“很容易做到的事，小菜一碟”
英语解释为to be very easy。
例
I'm glad to help. It was a piece of cake.
很高兴能帮上忙，这很容易。
Believe me, with your dance background,
it'll be a piece of cake.
相信我，以你的舞蹈背景，这是小菜一碟。

●轻而易举 cakewalk

cakewalk “易如反掌的事情，
轻而易举的胜利”
英语解释为a very easy thing to do,
or a very easy victory。
例：
The test was a cakewalk.
考试很容易。
Well, doesn't it sound like a cakewalk, right?
听起来轻而易举，对吧？