Abbreviation for light rail transit, an urban rail system.

• Medium-capacity electric trains on semi-exclusive or reserved tracks.

Light Rail Transit 的缩写，指轻轨交通。

• 城市轨道系统，电力列车在专用或半专用线路运行。

Abbreviation for last retweet in social media.

• Refers to the most recent retweet made by a user.

社交媒体中 last retweet 的缩写，指上一个转推。

• 指用户刚刚进行的最近一次转推。