one at a time
英 美
"the prisoners came out one by one"
In an experiment, a researcher will place nuts into a can one at a time and then remove them one by one.
在一项实验中,研究人员每次把坚果放入一个罐子,然后再一个接一个地把它们取出来。
We had to go and see the principal one at a time.
我们得逐一去见校长。
Introduce foods one at a time and notice if you feel uncomfortable with any of them.
一次尝一种食物,看你是否对其中某种食物感到不适。
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