one at a time

基本解释

Begin by asking employees, one at a time, what they need to perform at their best.
因此，首先，每次问一个员工，他们在自己状态最好的时候需要些什么？
You want to make sure you don’t get something that requires putting each page, one at a time, on a flat bed.
有些需要把每页纸一次一页地放在平坦的床上进行浏览，因而要确定从中你会不会得到一些东西。
That's exactly what happened with smoking. Smokers were essentially just pushed to the outer edges of social networks one at a time.
这正是发生在吸烟者身上的事件，吸烟者基本上在某个时间点会被推到一个边缘的社会网络。

A reputation -- what people think of you, good or bad -- is built one message at a time.
So what would I want to do? I'd like to somehow walk down each of the digits one at a time and add them up. Ah, that's a looping mechanism, right? I need to have some way of walking through them.
去取这个数的,每个数字然后把他们加起来,啊，这是个循环机制对不对？,我得找到一个遍历它们的方法,一种简单的方法可能。
麻省理工公开课 - 计算机科学及编程导论课程节选
And you like working with kids. But maybe just one or two at a time.
你挺喜欢跟小孩子相处的，但也仅仅是同时跟一两个孩子打交道的时候。
How many课堂 - SpeakingMax英语口语达人

See the movies one at a time, with a stiff drink after each one.
NEWYORKER: The Red Riding Trilogy