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数系；记数制；记数"XiTong"
1、cattery number───家畜数
2、flat number───公寓号
3、tellurium number───碲数
4、duns number───邓白氏编码 (Data Universal Numbering System Xi Tong)
5、school number───学校编号
6、roll number───磁带卷号；辊轧号数
7、number───vi.计入；总数达到；vt.编号；计入；数…的数目；使为数有限；n.数；（杂志等的）期；号码；数字；算术
8、system───n.制度，体制；XiTong；方法
9、verification number───验证号码
1、As they began to settle, grow plants and herd animals, the need for a sophisticated number system become paramount.───当他们开始定居、种植和养殖的时候，计数就显得更加重要了。
2、The digits following the prefix must be appropriate for the number system.───跟在前缀后面的数字必须适合于数制。
3、This capability, referred to as the approximate number system (ANS), is normally present in infants and improves with age.───这种能力，可称之为略估数学XiTong (A N S)，在婴儿时期就存在并随着年龄增长而增强。
4、It is occasionally necessary to use a number system to designate the position of each ligand.───有时需要用一种编号XiTong来标明各配体的位置。
5、The need for a logical foundation of the number system was aggravated by the Alexandrian's free use of numbers.───由于亚历山大人随意使用数，所以对于数系的逻辑基础就更加显得迫切需要。
6、As they began to settle, grow plants and herd animals, the need for a sophisticated number system became paramount.───当他们开始定居、种植作物和饲养动物时，他们对复杂数字XiTong的需求变大。
7、They also have their own language which have a number system but it only goes up to four.───他们也拥有自己的语言，包含计数体系，然而到4就截止了。
8、patterned series of these tiny charged berries on the disk represents a single bit of data in the binary number system used by computers.───磁盘上这些模式化的带电小粒子代表了计算机使用的二进制数字XiTong中的单个数据位。
9、China has announced plans to establish a social security number system for the welfare of its citizens.───中国公布了关于建立社会安全号码XiTong的计划，是中国公民的福利一部分。
1、A number system written to the base two notation.
2、Of or relating to the decimal number system.
3、Accordingly, we shall usually use the binary number system, as described earlier.
4、The exchanging of different number system is an important basic section on study computers.
5、The sexagesimal scale, or number system based on 60(sentencedict.com/number system.html), was used by ancient Babylonians.
6、The binary number system has two as its base.
7、They delivered our current number system.
8、The acceptability of real number system depends on practice.
9、Computers use the binary number system.