12.14.15.16

12.14.15.16 连词12.14.15.16.17.18.19.20.21 11.12.12.14.15.16.17.18.19.-9=1 12.14. 15.16. 15.16, 15.16. 15.16. 15.16. 15.16. 15.16. 15.16 15.16 15.16. 15.16. 15.16. 15.16 15.16