七进制是以7为底数的记数系统。使用数字0-6。
如果你要问卡尔斯·普约尔这样一个问题：有七名巴塞罗那队的球员在进入了世界杯决赛阶段的西班牙国家对踢球，他期望哪一个是踢进制胜一球的球员。他会把自己放到最后一位。
If you were to ask Carles Puyol which of the seven Barcelona players on the Spanish team that has reached the World Cup final he would expect to score the winning goal, he would place himself last.
通信仿真平台的任务是对调幅、调频、单边带、二进制振幅键控、二进制频移键控、二进制相移键控、正交相移键控等七种通信信号的调制和解调进行建模和计算。
The target of the communication system flat is modeling and calculating to modulation and demodulation of seven kinds of signals:AM, FM, SSB, 2ASK, 2FSK, 2PSK, 2QPSK.
用于表示十靳制数的一种服进制编码的十进制码，其籽每位十靳制数用七位服进制数来差示，它那钢别是8,6,4,2,0,1和0的系数。
A binary-coded decimal code for representing decimal Numbers in which each decimal digit is represented by seven binary digits which are coefficients of8, 6, 4, 2, 0, 1, 0, respectively.
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