primary drive

例句：

1. 1. The primary driver of the company's success is its innovative products.
   公司成功的主要驱动力是其创新的产品。
2. 2.The primary factor influencing this decision was the lack of resources.
   影响这一决策的主要因素是缺乏资源。
3. 3.The primary drive behind their success is their dedication to excellence.
   他们成功的主要动力是对卓越的追求。