Too many columns in a table can make the scan time for queries much longer than if there are just a few columns.

一个表中有太多列比仅有一些列时进行查询所需的扫描时间要长。

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The complex table layout also increased the time required to determine where to make a change or add content.

复杂的表布局还增加了确定在何处做更改或添加内容所需的时间。

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First, when you are looking over a table filled with food, choose just what you need to make a balanced meal. Also, take your time when making your choices.

首先，当你看着满满一桌菜肴时，只选择构成均衡营养一餐所需的食物。

youdao

First, when you are looking over a table filled with food, choose just what you need to make a balanced meal. Also, take your time when making your choices.

首先，当你看着满满一桌菜肴时，只选择构成均衡营养一餐所需的食物。

youdao