1three generations of a family
2the three earliest dynasties (Xia, Shang and Zhou)
Example
rì běn日本de的dì第sān dài三代tōng xìn通信fāng shì方式yǒu有W-CDMAhé和CDMA2000CDMA2000。
日本的第三代通信方式有W-CDMA和CDMA2000。
The third generation Japanese communication methods are W-CDMA and CDMA2000.