(1)单元，整体(anything regarded as an elementary structural or functional constituent of a whole)[C]：the family as the～of society 作为社会细胞(单位)的家庭;work in the third～在第三组(科室)工作;study Book 3 U～4 学习第三册第四单元;They form one～. 他们形成一个整体。The Hawaiian Islands form one political～. 夏威夷群岛形成一个完整的政治区域。Each building is divided into/contains 50 (self-contained) housing (living)～s. 每座楼分为/包含50个(自成一体的)居住单位。～trust (BrE)(=AmE mutual fund)单位信托投资公司;〖同〗part，element，section，division， whole;

(2)(计量，计数)单位(quantity adopted as a standard of measurement)[C]：The～of length is the metre. 长度单位是公尺。An ounce is a～of weight. 盎司是重量单位。The centimeter is a～of length.厘米是长度单位。The dollar is the standard～of money(currency) in America.美元是美国的标准货币单位。The degree Celsius is the～in which we measure temperature. 摄氏度是我们测量温度的单位。a～price 单价;SI～s 国际单位制;a bill for 50～s of electricity 50度电的账单;〖同〗measure， measurement，quantity;

(3)部(分)队(organized body of soldiers， varying in size and constituting a subdivision of a larger body)[C， Gp]：an army～ 军队小分队;a bomb-disposal～ 排弹部队;a～of highly-trained soldiers 受过严格训练的一队战士;

(4)(成套设备的)装置，(家具的)组合件(piece of apparatus serving to perform a particular function)[C]：a cooling/kitchen～制冷装置/厨房用具;storage/X-ray～s 储存/X射线装置;～furniture 组合家具;〖同〗part，element，section;division，whole;

(5)个位(数)，最小整数(any whole number between 1 and 9)[C]：a column for the tens and a colunm for the～s 一列十位数和一列个位数;In the number 54，5 is a ten， and 4 is a～. 数字54中，5是十位，4是个位。

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