He leaned on his elbows while reading at the desk.
他在书桌前看书,把手肘撑在桌上。
She banged her elbow on the door frame and yelped.
她的手肘撞到门框,疼得叫了一声。
撞到会发麻的那块叫 funny bone。elbow grease 是指卖力气干活的惯用语。
