例句：The postman tried to crush the packet through the letter-box.
邮递员使劲把邮件塞进信箱里。
bracket n. 括弧，支架 v. 括在一起
例句：The worker fixed a bracket on the wall.
工人在墙上固定了一个支架。
bucket n. 桶，一桶的量
例句：Is there much water in the bucket?
桶里有很多水吗?
racket n. 球拍，喧闹纷乱
例句：The ball just tipped the edge of Mark's racket.
球仅仅碰到马克球拍的边儿。
rack n. 架，行李架 vt. 折磨，加以拷问
例句：Sam put his bag on the luggage rack.
萨姆把包放在行李架上。
