(1)计数器(者)(person or machine that counts repeated mechanical actions)[C](用于合成词)：a～of votes计票器;The machine has a～to tell how many copies it will make.这机器有个计数器为制成的工件计数。set a～to the right number把计数器调准;

(2)筹码(small flat coloured pieces of metal，plastic，wood，etc，used in certain board games instead of money)[C]：～s for playing ludo骰子游戏的筹码;

(3)交换物(thing which can be exchanged for sth else)[C]：a useful bargaining～in negotiations with sb与……谈判中讨价还价的有利条件