使用generate命令即可，但要用完整格式：

generate newvar[:lblname] =exp [if] [in]

. sysuse auto,clear
(1978 Automobile Data)

. label list
origin:
           0 Domestic
           1 Foreign

. gen f = foreign

. gen fg:origin = foreign

. list foreign f fg in 1/5

     +-------------------------+
     |  foreign   f         fg |
     |-------------------------|
  1. | Domestic   0   Domestic |
  2. | Domestic   0   Domestic |
  3. | Domestic   0   Domestic |
  4. | Domestic   0   Domestic |
  5. | Domestic   0   Domestic |
     +-------------------------+

thanks!