1. infer [ɪn'fɜː]  v. 推断；推论I can infer from what&n

1. allow [ə'laʊ]  v. 允许；给予；认可； 容许；使能够 (发生)The compromise will allow him to conti

1. challenge ['tʃælɪn(d)ʒ]  n. 挑战；怀疑 vt. 向…挑战；对…质疑The demonstrators h

1. leadership  ['liːdəʃɪp]  n. 领导能力；领导阶层Without correct 

1. consumer [kən'sjuːmə]  n. 消费者；用户，顾客The choice of consumer goods availabl

1. essay  ['eseɪ]  n. 散文；短文；随笔We asked Jason to write an essay about his hometow

1. household ['haʊshəʊld]  adj. 家庭的；日常的；王室的 n. 全家人，一家人；Cheap imports&n

1. function ['fʌŋ(k)ʃ(ə)n]  n. 功能；[数] 函数；职责；盛大的集会 vi. 运行；活动；行使职责The ma

1. note [nəʊt] n. 笔记；音符；票据；注解；纸币；便笺；照会；调子 vt. 注意；记录；注解Take note of the weather condit

1. patent ['pæt(ə)nt]  vt. 授予专利；取得…的专利权n. 专利权；执照；专利品P&G applied for a paten