可打印版

按索引浏览词汇表

特殊 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 全部

2

2G

Second generation of mobile communication, GSM

3

3G

Third generation of mobile communication, UMTS

3GPP

Third generation partnership project, developing communication systems standards

4

4B3T

Coding used for ISDN. 4 bits are mapped to three ternary signal, four binary to three ternary.

4G

Fourth generation of mobile communication, LTE

5

5G

Fifth generation of mobile communication