Trais
abbr. Transportation Research Activity Information Service (Department of Transportation) 交通研究活动信息服务（交通部）
🗣️ 情景例句
Good-bye.
再见。
The worth of a thing is best known by the want of it.
物以稀为贵。
This increases the expense of government,
这样一来就增加了政府的开支，