rachelkong
double意思为一对，一双；双重地；酷似的人；把...对折；变成两倍；增加一倍。double可作形容词、副词、动词用。double（双精度浮点型）是计算机使用的一种资料型别。比起单精度浮点数(float)，double(双精度浮点数)使用64位（8字节）来储存一个浮点数。它可以表示十进制的15或16位有效数字，负值取值范围为-1.7976E+308到-4.94065645841246544E-324，正值取值范围为4.94065645841246544E-324到1.797693E+308一站式出国留学攻略
缘梦~幸福宝贝
双数英文是even numbers。
例句：
1、热菜为主，一般为双数，如4个、6个、8个。
Hot dishes are the main courses，usually there are even numbers of hot dishes, 4, 6 or 8.
2、只要你准备的彩礼单是双数，这就是尊敬新娘家的表现。
As long as you present some of the gifts on the list in even numbers, it is a wonderful gesture that shows respect to the bride's family.
3、所有的礼物都是双数，意指“喜上加喜”。
All gifts should come in even numbers, meaning "good things double" .
4、那段时期，北京强制推行了严苛得多的规定，要求车辆按车牌尾号单双数隔日限行，使得路上跑的汽车减少了将近200万辆。
During that period, the city enforced a much tougher measure that called for alternate driving days for cars with evenand oddnumbered license platesand took almost two million cars off the road.
5、方法任选60例中风急性期患者（全部经CT或MR确诊），将住院号为双数者列为观察组，住院号为单数者列为对照组，每组30例。
Methods 60 cases with acute heart stroke, all affirmatively diagnosed by CT or MR, were randomly divided into groups according to their registration numbers: 30 with odd number as observational group and the other 30 with even number as control group.
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