developer
/dɪˈveləpə(r)/noun
1- a person or thing that develops something发展者, 开发者; 推动发展的事物：
a property developer
房地产开发商
software developers.
软件开发商。
1.1
- with adj. a person who grows or matures at a specified time or rate（在特定时间或以特定速度）成长（或发育成熟）的人：
I was a slow developer.
我发育较慢。
1.2
- mass noun a chemical agent used for treating photographic film to make a visible image显影剂。