base…on/upon…(=be based on/upon)根据……；以……为基础
be based in 驻扎,设立,以……为基地
on the basis of……根据；在……的基础上 base…on/upon…(=be based on/upon)根据……；以……为基础
be based in 驻扎,设立,以……为基地
on the basis of……根据；在……的基础上