ONE PHRASE, IN CONTEXT
at a time
每次;一次

GET TO KNOW THE MEANING
同一个表达,不同的语境。
01每次;一次
IN A SENTENCE
The gate itself is wide enough for only one person to pass through at a time.
这扇门的宽度只够一人通过,因此一次只能过一个人。
02一次;每次
IN A SENTENCE
The elevator can carry only four people at a time.
这部电梯每次最多只能载四个人。
