at one time

• 用于表示过去某个时候，意思是“以前”或“曾经”。也可以表示“同时”或“在同一时间”。

A phrase used to refer to a past period, meaning formerly or at some point in the past. It can also mean simultaneously or at the same time.

1. In the pastB1formal

   At a previous point in time; formerly.

   曾经

   • At one time, this building was a school.
   • At one time, she lived in Paris.
   • At one time, people believed the Earth was flat.

2. SimultaneouslyB1formal

   At the same moment; all together.

   同时

   • The two events happened at one time.
   • You cannot be in two places at one time.
   • All the alarms went off at one time.