We planned this several days ago.

我们几天前就计划要出行了。

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AIDS is what, to be honest I don't know, but I know that AIDS is not as bad as the rumored, this several days and students together to study some content about AIDS, I have benefited a lot from.

艾滋病是什么，说实话我并不太了解，但是我知道艾滋病并不像传闻中的那样可怕，这几天和同学们在一起研读了一些关于艾滋病方面的内容，使我受益匪浅。

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She thanks you by giving you a piece of delicious home-made apple pie. This happens several days in a row.

为了表示感谢，她赠给你一片美味的自制苹果派，这在接下来的几天里连续发生。

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Days after the attack, several thousand people came to this state-sanctioned anti-terrorism rally in Moscow.

VOA: standard.2009.12.12

When temperatures are this extreme several days in a row, power companies scramble to manage peak demand, often urging consumers to turn off non-essential use of electricity.

WHITEHOUSE: Energy and Environment Latest News | The White House

The kernel also can be soaked in lye (wood ashes, traditionally) to make hominy, but this process takes several days, so it wasn't always an option.

NPR: Kernels of Truth About Cornmeal

Unfortunately, this adventure would last several days for one of his dogs.

FORBES: How Facebook Helped Find a Lost Dog