Examples
tā他wú néng wéi lì无能为力，zhǐ hǎo只好fàng qì放弃jì huà计划
他无能为力，只好放弃计划
He could do nothing but give up his plan against his will.
我不是不同情你，但我实在是无能为力。
It's not that I am unsympathetic, but I am not able to help you.
我对此无能为力。
There's nothing I can do about it.