A: What type of tree is that?
　　B: I think it is a maple
　　maple n. 槭树，枫树，槭木

　　A: I really dislike Stephanie.
　　B: Don’t try to mar me with your negative impressions of her before I even meet her.
　　mar vt. 破坏，毁坏

　　A: I’m getting a new fireplace installed.
　　B: Is it the marble one you had your eye on?
　　marble n. 1. 大理石;2. (用玻璃、石头等制成的)弹子;3. [pl.]弹子游戏

　　A: The mare is expecting her foal in three weeks.
　　B: Oh! I thought a mare was a male horse, silly me!
　　mare n. 母马，母驴

　　A: Did you do well in the exam, Sir?
　　B: Yes, you only made some marginal errors.
　　marginal a. 1. 微小的，少量的，不重要的;2. 仅以微弱多数票获胜的;3. 记(或引)在页边的，有旁注的

　　A: Have you ever smoked marijuana?
　　B: No, I have never tried drugs.
　　marijuana n. 大麻，大麻烟

　　A: What is your marital status?
　　B: I am married.
　　marital a. 婚姻的，夫妻的

　　A: I’m going to visit the maritime museum this afternoon.
　　B: I assume that it is the one by the sea.
　　maritime a. 1. 海的，海事的，航海的;2. 近海的，海的

　　A: It rained so much. My garden is like a marsh.
　　B: Don’t worry, it will dry out soon.
　　marsh n. 沼泽，湿地

　　A: I was a marshal in the army for 11 years.
　　B: Gosh, that is a high rank, you must have worked hard to get there.
　　marshal n. 1. 元帅，最高指挥官;2. (某些群众活动的)总指挥，司仪;3. (美国的)执法官，警察局长，消防队长
　　vt. 整理，排列，集结

　　A: I read that the ancient Romans were martial people.
　　B: I’m not sure if they were inclined to war.
　　martial a. 战争的，军事的，武术的

　　A: The sunset is amazing.
　　B: Yes, I am sitting here marveling at it right now.
　　marvel vi. (at) 惊叹，赞佩
　　vt. 对……感到惊异
　　n. 令人惊异(或不可思议)的事，奇迹

　　A: That girl looks particularly masculine.
　　B: Maybe it is because she lifts weights.
　　masculine a. 1. 男性的，男子的;2. 男子气的

　　A: Shall I mash your potatoes?
　　B: No, thanks, I like them whole.
　　mash vt. (up)　把……捣成糊状
　　n. 糊状物

　　A: The soldiers massacred each other with gunfire during the war.
　　B: Do you know how many people were killed?
　　massacre vt. 1. 大规模屠杀，残杀;2. 彻底击败
　　n. 1. 大屠杀，残杀;2. (比赛等)残败