2002年2月，道家花园举行了不朽疗法，第一次使用暗室技术为高阶练习者创造出一个完整的环境。
In February 2002, the Immortal Tao practices were held at Tao Garden for the first time using the Dark Room technology creating a complete environment for the higher level Taoist practices.
在众所周知的相机出现以前，人们使用这样的暗室根据物体的形象生成精确的影像。
In the days before the kind of cameras we know, people would use such darkened rooms to trace an accurate sketch on the wall based on the projected image.
虽然每块感应器价值6000美元（当然病人使用过后要清洗并重复使用），但从另一方面看，诊所无需再花钱搭建一间暗室了。
The sensors cost $6,000 apiece. (Yes, they're cleaned and reused.) On the other hand there's no need to spend money stocking and maintaining a dark room.
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