knuckled的读音 knuckled中文意思

读音 
v. (指人)指关节( knuckle的过去式和过去分词 );(指动物)膝关节,踝
knuckled 用法和例句
So I rolled up my sleeves , knuckled down .
于是我挽起袖子,开始认真地投入工作中。
He knuckled me in the chest .
他用指关节敲击我的胸部。
His knuckled were white as he gripped the steering wheel .
他屈服,因为他是白人抓住方向盘。
It 's high time you knuckled down to some hard study .
你该开始刻苦学习了。