时长英语怎么说

时长的英文是 "duration"，来源于拉丁语 "duratio"，意为"持续时间"。

例句：

The duration of the movie was two hours. (这部电影的时长是两个小时。)
The duration of the event was two days. (这个活动的时长是两天。)
The duration of the project was six months. (这个项目的时长是六个月。)