adj.(女人)苗条的,高而纤细的,袅娜
She managed to stop smoking by sheer willpower.
她全靠意志力戒了烟.
His attempts to stop smoking by willpower alone failed.
他多次想单凭意志力戒烟都没有成功。
I know I've got the willpower to do it.
我知道我有毅力做这事儿。