把对折英语

double是一个英语单词，意为一对，一双，双重地，酷似的人，把对折，变成两倍，增加一倍，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。

double含义说明

double是双倍精度浮点数，其内部采用64位2进制存储的浮点数，其中1位表示正负的符号位，11位存储指数，52位存储尾数。因为double的尾数是float尾数两倍多，顾称为双倍精度浮点数，这就是double的由来。

double不仅尾数长，指数位也大，所以double的表示的范围非常大，利用double完全可以轻松处理宇宙级别的数字。由于double范围足够大所以Java就不再需要更大的数据类型了。

fold [fəuld]v.折叠，交叠 n.褶痕，褶缝，折叠的部分double up vt. 加把劲(双杀中第二个接杀)例句:The carpet is too thick to double up.这地毯太厚没法折叠。The rug won't double up.这条地毯卷不起来。Come on, comrades. Double up.来，同志们，赶快！

middle /ˈmɪdl/ DJ /'mɪdḷ/ KK noun the part of something that is at an equal distance from all its edges or sides; a point or a period of time between the beginning and the end of something 中间；中部；中央；中心 singular a lake with an island in the middle 中央有一个小岛的湖 He was standing in the middle of the room. 他站在屋子的中间。 The phone rang in the middle of the night. 半夜里响起了电话铃声。 This chicken isn't cooked in the middle. 这只鸡还没有熟透。 His picture was right/bang(= exactly)in the middle of the front page. 他的照片就登在头版的正中央。 Take a sheet of paper and draw a line down the middle. 拿出一张纸，在中间画一条线。 I should have finished by the middle of the week. 我在这周过半的时候应该就能完成。 Alternate: the middle a person's waist 腰部 countable usually singular informal He grabbed her around the middle. 他拦腰抱住她。 I've put on weight around the middle. 我的腰部发胖了。 Idiom: be in the middle of something/of doing something to be busy doing something 忙于做 They were in the middle of dinner when I called. 我打电话的时候，他们正在吃饭呢。 I'm in the middle of writing a difficult letter. 我正在写一封很难写的信。 Idiom: the middle of nowhere informal a place that is a long way from other buildings, towns, etc. 偏远的地方 She lives on a small farm in the middle of nowhere. 她住在一个偏远的小农场。 Idiom: split/divide something down the middle to divide something into two equal parts 平分；分为相等的两半 The country was split down the middle over the strike(= half supported it, half did not). 国内支持和反对罢工的人势均力敌。 See also: pig/piggy in the middle adjective in a position in the middle of an object, group of objects, people, etc. between the beginning and the end of something 中间的；中央的；居中的；正中的 only before noun Pens are kept in the middle drawer. 钢笔在中间那个抽屉里。 She's the middle child of three. 三个孩子，她是老二。 He was very successful in his middle forties. 他在四十五六岁时很成功。 a middle-sized room 中等大小的房间 the middle-income groups in society 社会中等收入阶层 Idiom: (steer, take, etc.) a middle course; (find, etc.) a/the middle way (to take/find) a course of action that is a compromise between two extreme positions （走）中间路线；（取）中庸之道

打折: Discount 打对折: 50% off 打8折: 20% off

n. 中央, 腰部, 中间adj. 中央的, 中间的, 中庸的

double英 [ˈdʌbl] 美 [ˈdʌbəl] adj.双的;两倍的;两面派的;双人用的vt.使加倍;把…对折;重复vi.加倍，加倍努力;快步走adv.两倍地;双重地n.两倍;双精度型第三人称单数： doubles 复数： doubles 现在分词： doubling 过去式： doubled 过去分词： doubled

double是双精度浮点数errorc2296:'%':illegal,leftoperandhastype'double'这句话的意思是说左操作为double类型，不合法%取余操作不能用非整数进行，所以会不合法x+a%3*(x+y)%2/4改为x+(int)(a%3*(x+y))%2/4

fold in halffold updo the above actions twice