清单1显示了一些例子，说明了提示字符串(来自PS 1环境变量)与本文中的其他例子不同。

Listing 1 shows some examples where the prompt strings (from the PS1 environment variable) are different from the other examples in this article.

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有许多的提示和线索引导玩家再现灾难，并让他们有身临其境的感受。

There's lots of notes and clues to help the player recreate the disaster and give them a feel for the bigger picture.

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