元组（tuple）是关系数据库中的基本概念，关系是一张表，表中的每行（即数据库中的每条记录）就是一个元组，每列就是一个属性。在二维表里，元组也称为行。
双语例句原声例句
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穿山甲的鳞片由非常薄的棱柱形结构单元和折叠单元组成。
The scales of the pangolin were composed of the very thin prismy construction units and the folded units.
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每个元组代表一对股票代码和股价。
Each tuple represents a pair of stock tickers and stock prices.
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其它有效性类应该列在该元组中。
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And I responded to at least one email about this issue, someone quite correctly said tuple are immutable, how can I change one?
我在不止一封邮件里回复了这个问题,一些人很明智，知道元组不可变,但是疑问怎么能去改变他们，我的答案是？
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My answer is, you can't change one but you can create a new one that is almost like the old one but different in a little bit.
既然你不能改变元组,你可以新建一个跟原来的元组,大体上一致但有细微差别的元组。
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And the nice thing is that there's a shared behavior there. Just as I can have tuples as an ordered collection of things, strings behave as an ordered collection of things.
共享的行为，就像元组是有序的元素序列,字符串也是有序的元素序列,因此我可以对字符串做同样的操作,我可以把它们连结起来。
应用推荐
$firstVoiceSent
- 来自原声例句