the situation in which you need something or someone all the time, especially in order to continue existing or operating

The company needs to reduce its dependence on just one particular product. 该公司需要减少只对一种特定产品的依赖。

Drug dependence led to her early death. 药物依赖导致她过早死亡。

She has developed a deep dependence on him (= she needs him emotionally). 她对他产生了深深的依赖。