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1·I can only carry two at a time.

我一次只能带两个。《牛津词典》

2·Let's attack one problem at a time.

咱们一次全力处理一个问题。《牛津词典》

3·My mind could only assimilate one impossibility at a time.

我的头脑一次只能吸纳一件不可能的事情。《柯林斯英汉双解大词典》

4·The boats remain at sea for an average of ten days at a time.

这些船平均每次在海上呆10天。《柯林斯英汉双解大词典》

5·Now she must talk her sister through the process a step at a time.

现在她必须向她姐姐详细解释这个过程，一次只说一个步骤。《柯林斯英汉双解大词典》

6·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》

7·Don't eat too much at a time.

一次不要吃太多。

8·Then play one note at a time.

然后一次弹一个音符。

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

把硬币丢到桌子上，一次扔一个。

10·I can't stay focused on one thing at a time.

我无法一次只专注于一件事。

每次

1·You could spend weeks at a time here, and still not experience everything Orlando has to offer.

这里，即使你每次都待上几个星期也还不能感受到奥兰多提供的一切。

2·Only one column can be sorted at a time.

每次只能有一列可以进行排序。

3·You may introduce practices a few at a time.

每次您还可以引进一些实践。

4·You cannot create specific circumstances, and because you are testing more than one thing at a time, confusion can arise over which part is failing.

您无法创建特定的环境，并且由于每次要同时测试多项内容，因此很难判断哪些部分出现了问题。

5·Streaming the file allows us to look at a small portion of the data at a time.

通过流式传输文件，我们可以每次考虑一小部分数据。