at a time
01
一度に, 一つずつ
used to describe doing things in separate amounts, steps, or groups instead of all at once
例
They can only serve one customer at a time during peak hours.
ピーク時には、一度に一人の顧客にしか対応できません。
You can only take two items at a time to the checkout.
一度に2つのアイテムしかレジに持っていけません。
