他正准备将胶卷放入显影液中。

He is about to place the film in the ___developer.

这位开发者为公司设计了一款新的手机应用。

The ___developer created a new mobile app for the company.

这位开发商计划在这块空地上建造一座住宅小区。

The ___developer plans to build a residential complex on this vacant lot.