dependency

1. N-COUNT A dependency is a country which is controlled by another country. 附属国

...the tiny British dependency of Montserrat in the eastern Caribbean. …东加勒比地区英国的小附属国蒙特塞拉特岛。

2. N-UNCOUNT You talk about someone's dependency when they have a deep emotional, physical, or financial need for a particular person or thing, especially one that you consider excessive or undesirable. 依赖

We saw his dependency on his mother and worried that he might not survive long if anything happened to her. 我们看到他对母亲的依赖，担心万一她有个闪失，他也会活不长。

3. N-VAR If you talk about alcohol dependency or chemical dependency, you are referring to a situation where someone is an alcoholic or is addicted to drugs. (毒、酒) 瘾[美国英语]

In 1985, he began to show signs of alcohol and drug dependency. 1985年，他开始表现出酗酒和吸毒成瘾的迹象。