EATH AT ONE TIME /ONE BY ONE TIME /ONCE FOR EACH TIME /ONE AT A TIME什么意思?

Question

救命啊~~各位大虾~拜托你们了^-^

Answer 1

each at one time: 每次一个 （比如你每次只能拿一个水果）
one by one time: 一次一个
once for each time: 每次一次 （比如你每排一次队可以用一次电脑）
one at a time: 一次一个 （比如你一次拿一个水果，很快就拿了不少）