[ lìbùcóngxīn ] one's strength does not match one's ambitions.; ability falling short of one's wishes; ability not equal to one's ambition; be unable to do as well as one would wish; bite off more than one can chew; far exceed one's power; strength not equal to the will; lacking the ability to do what one would like to do; more than willing but lack the power to ...; one's strength falls short of one's desire [will; wishes].; the spirit is willing but the flesh is weak.; with no physical strength 短语和例子 我想用英语来谈话, 但是力不从心。 i tried to carry on a conversation in english, but it far exceeded my ability