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1·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。

2·We had to go and see the principal one at a time.

我们得逐一去见校长。《牛津词典》

3·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。《柯林斯英汉双解大词典》

4·Drop the coins onto the table, one at a time.

把硬币丢到桌子上，一次扔一个。

5·Gray squirrels bury nuts one at a time in a number of places.

灰松鼠在很多地方一次埋一个坚果。

6·He has learned to read for main ideas rather than words one at a time.

他学会了阅读主要思想而不是逐字逐句地阅读。

7·She says the current way to identify whether chemicals cause cancer is to test them one at a time.

她说目前确认化学成分是否造成癌症的途径每次对其进行试验。

8·Step legs back one at a time.

双脚依次向后迈步。

9·Complete your tasks one at a time.

第五招，一次完成一项任务。

10·Let her take us over one at a time.

让她一次带我们一个人过去吧。