Some examples of word usage: knuckling
1. He was knuckling his fists as he prepared for the fight.
他正握紧拳头准备战斗。
2. She was knuckling the door in frustration, trying to get someone's attention.
她气愤地用指关节敲打着门,试图引起某人的注意。
3. The athlete was knuckling down and focusing on his training for the upcoming competition.
运动员正在认真训练,专注于即将到来的比赛。
4. The child was knuckling his eyes, trying to rub away the sleepiness.
孩子用指关节揉着眼睛,试图摆脱睡意。
5. The teacher told the students to stop knuckling around and pay attention.
老师告诉学生停止胡闹,认真听讲。
6. The worker was knuckling down to finish the project before the deadline.
工人正在认真工作,以在截止日期之前完成项目。