我的室友当时在房间里。

My roommate was in at the time.

《柯林斯英汉双解大词典》

德里克和我关系密切，我们曾是两年的室友。

Derek and I are close; we were roommates for two years.

《柯林斯英汉双解大词典》

我室友凯特是个很有条理的人。

My roommate Kate was extremely organized。

youdao

If your roommate is dependent and needy, you could then go to your roommate and say, "You are an oral person.

如果你的室友很依赖他人，很粘人，你可以去告诉他，“你具有口腔期人格。

耶鲁公开课 - 心理学导论课程节选

Not with this girl, this girl is perfect. But in the past, I've had lots of problems with roommates.

和这个女孩没吵过，她太完美了。但在过去，我和室友之间存在很多问题。

布鲁克林的房价 - SpeakingMax英语口语达人

You know, I mean right now it's me and whoever it was and me and my roommate Dustin and just come sitting there work serially on a new project and then finishing it and then planning how on doing the next project.

你要知道，那时候是我,还有我的室友达斯汀以及其他人,大家一起，一步一步地将整个项目完成,然后一起探讨下一个项目。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选