Petra is famous for its many stone structures such as a 138-foot-tall (42-meter-tall) temple carved with classical facades into rose-colored rock. The ancient city also included tunnels, water chambers, and an amphitheater, which held 4,000 people.
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The ancient city also included tunnels, water Chambers, and an amphitheater, which held 4,000 people.
这古代的城市也包括地下隧道，水室，和一个圆形剧场，那容纳4千人。
Initially both detector and lens are flat. Beneath both the membranes of the detector and the simple lens are Chambers filled with water.
最初检测器和透镜都是平的，在检测器薄膜和透镜单片下是装满水的舱室。
But with the new nanotube devices, the Chambers would have to be replenished with carbon dioxide and water from time to time to keep the reaction going.
但是对于这个新的纳米管装置，需要不断向仪器内通入二氧化碳和水来维持反应的继续。
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