他们并不知道，从一个单向镜的后面，还有一名男性和一名女性观察员在观察着他们之间的互动。
Unbeknownst to them, a male observer and a female observer watch the interaction from behind a one-way mirror.
单向认人镜具有反光涂层应用于一个非常薄，稀疏的层——如此之薄这被称为一个半镀银的表面。
A one-way mirror has a reflective coating applied in a very thin, sparse layer — so thin that it's called a half-silvered surface.
随后的几天里，我不知道儿童的营养食谱。始末单向的玻璃镜查察孩子们是多么自愿地接续绘画。
Then over the next few days the children were watched through one-way mirrors to see how much they would continue drawing of their own contrprocess.
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