Monorails
n. 单轨（铁路）( monorail的复数形式 ); 单轨索道
🗣️ 情景例句
who used to run the drugstore in town.
他过去在镇上经营药房。
In vain.
白忙一场。
Broadly speaking, human beings may be divided into three classes: those who are toiled to death,
劳累至死的人、