无能为力、力不从心

无能为力	无能为力 wúnéngwéilì [powerless;can do nothing about it] 用不上力量,也指无力相助或力量达不到 人对于自然界不是无能为力的
力不从心	力不从心 lìbùcóngxīn [ability falling short of one's wishes;ability not equal to one's ambition;lack the ability to do what one would like to do; the spirit indeed is willing, but the flesh is weak] 心里想做,但能力达不到 今使者大兵未能得出,如诸国力不从心,东西南北自在也。——《后汉书·西域传》

不自量力、蚍蜉撼树、力不从心、量力而行

不自量力	不自量力
蚍蜉撼树	见“ 蚍蜉撼大树 ”。
力不从心	力不从心 lìbùcóngxīn [ability falling short of one's wishes;ability not equal to one's ambition;lack the ability to do what one would like to do; the spirit indeed is willing, but the flesh is weak] 心里想做,但能力达不到 今使者大兵未能得出,如诸国力不从心,东西南北自在也。——《后汉书·西域传》
量力而行	量力而行 liànglì’érxíng [act according to one’s capability; do what one is capable to] 按照自己能力大小去做事 朕当量力而行,然定可否。——唐· 吴兢《开元升平源》

词语拼音：lì suǒ bù jí

词语解释：力所不及