杰克偶然发现了一段台阶，他顺着台阶来到了一扇锁着的门前，其中一名警卫通过无线台把这个消息告诉了安德烈·德拉赞，安德烈正在附近一个伪装的帐篷内扎营。

Jack stumbles upon a stairwell that leads to a locked door, and one of the guards radios this news to Andre Drazen, who is camped in a nearby camouflaged tent.

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每扇向我们打开的门都向我们展现一段非凡的故事——但有一家的门铃我们一直没有急着去按响。

Every door that opened to us revealed another extraordinary story-but there was one doorbell we didn't rush to ring.

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确定研究区沙三段主要发育有辫状三角洲、近岸水下扇、滑塌浊积扇等几种沉积相类型；

There are three main types of sedimentary facies: braided-river delta, slip turbidite fan, near-bank submerged alluvial fan.

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