Eng: At a

茫然不知

At a complete loss

以另一個速率

At a different rate

下處於下風

At a disadvantage

光憑一眼

At a glance

一眼

At a glance

在離家不遠的地點

At a location close to home

在比路面高的地方

At a place high above street level

在夏綠蒂公主的信號下

At a signal given by Princess Charlotte

一次

At a time