对此的制约因素是卫星图片，显然图片是需要。时时更新的。

The limiting factor is the satellite imagery-which obviously has to be up-to-date.

youdao

制作并维护销售材料，时时更新自身对产品的认识。

Develop and maintain sales materials and current product knowledge.

youdao

制作并维护销售材料，时时更新自身对产品的认识。

Develop and maintain sales materials and current product knowledge.

youdao