同室者

例句：

1. 1. I have a roommate who is always late for class.
   我有一个室友，他总是上课迟到。
2. 2. The roommate was very helpful when we moved in.
   我们搬进来时，室友非常有帮助。
3. 3. We need to find a new roommate because our current one is leaving.
   我们需要找一个新室友，因为我们的现有室友要离开了。