相对于通过键列跨不同的表链接不同行，最佳实践将是在一行中有许多列。

The best practice is to have many columns in a row, as opposed to linking different rows across different tables via key columns.

youdao

每当海豚用前额按响一个键时，研究者们则会超水中抛下相对应的道具。

When a dolphin pressed a certain key with her nose, researchers would throw the corresponding prop into the water.

youdao

要这样做，需要确保当XML元素包含子元素时，子元素包含与父代主键相对应的外键。

To do that, we need to make sure that when an XML element can contain a subelement, the subelement contains a foreign key corresponding to the parent's primary key.

youdao