老板在会议上大声咆哮了20分钟，抱怨团队效率低下。

The boss ranted for 20 minutes in the meeting, complaining about the team's inefficiency.

### 解释 ranted 是动词 rant 的过去式，rant 的意思是"咆哮、怒骂"，指情绪激动地大声抱怨或指责，通常带有负面含义。