查询词典 practical unit

unit step function：单位阶函数

unit process 单元程序 | unit step function 单位阶函数 | unit vector 单位向量

Having Good Table Manners：用餐礼仪

Unit 21 餐厅订位 Making Reservations | Unit 22 用餐礼仪 Having Good Table Manners | Unit 23 特殊点餐需求 Eating on special Diets

Unit Tewlve：谈论天气

Unit Eleven 表示感情 | Unit Tewlve 谈论天气 | Unit Thirteen 购物

Thank-you Letters：感谢信函

Unit 15:定单事宜 Letters Dealing with Orders | Unit 16:读者致函 Letters to the Editor | Unit 17:感谢信函 Thank You Letters

Unit 5 SEFC B2A The British Isles：第27节

第26节 Unit 4 SEFC B2A A garden of poems | 第27节 Unit 5 SEFC B2A The British Isles | 第28节 Unit 6 SEFC B2A Life in the Future

At the Customs：机场通关

Unit 3 飞机旅程 Air Travel | Unit 4 机场通关 At the Customs | Unit 5 宾馆住宿 At the Hotel

Complimenting the Staff：夸奖员工

Unit 42 相互帮助 Offering Help | Unit 43 夸奖员工 Complimenting the Staff | Unit 44 表示祝贺 Expressing Congratulations

Complimenting the Staff：肆叁 夸奖员工

Unit 肆贰 相互帮助 Offering Help | Unit 肆叁 夸奖员工 Complimenting the Staff | Unit 肆肆 表示祝贺 Expressing Congratulations

Complimenting the Staff：嘉奖员工

Unit 42 彼此帮助 Offering Help | Unit 43 嘉奖员工 Complimenting the Staff | Unit 44 暗示祝贺 Expressing Congratulations

Criticizing the Staff：批评员工

Unit 1 夸奖员工 Complimenting the Staff | Unit 2 批评员工 Criticizing the Staff | Unit 3 辞职与解雇 Resignation and Dismissal

phenol red：酚红,苯酚磺酞

phenol reagent 酚试剂 | phenol red 酚红,苯酚磺酞 | phenol red test 酚红排泌试验

accessory equipment：附件

accessory equipment 辅助设备 | accessory equipment 附件 | accessory part 附件