为了逃离时期，你必须完成精灵们发布的一系列挑战。

To escape the time period, you must complete a series of challenges posted by the elves.

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当植物开辟土地时，它们面临着陆地环境带来的一系列挑战。

When plants pioneered the land, they faced a range of challenges posed by terrestrial environments.

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高可用性被视为一系列挑战，本文介绍的解决方案描述了第一个步骤。

High availability is best seen as a series of challenges, and the solution outlined here describes the first step.

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