In short, if there's such a thing as a true price level, it cannot be altered by expensive goods anymore than cheap imports can drive it down.
概而言之，如果存在一个真实的物价水平，则无论价格昂贵的商品还是廉价的进口都不可能给它带来必然的改变。
What Secchi produced was a dinner plate-sized white disk that is lowered into ocean water until it cannot be seen anymore.
所谓塞齐盘就是餐盘大小的白色磁盘，把它沉入海水，直至再也看不见。
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