two-way mirror
柯林斯词典
1. N a half-silvered sheet of glass that functions as a mirror when viewed from one side but is translucent from the other 雙曏玻璃鏡; 半影角薄玻璃，從一麪看有鏡子功能
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two-way mirror
剑桥词典
- a mirror that can be used in the usual way from one side but is transparent from the other side and can therefore be used to watch people without them knowing
雙曏鏡（從一麪看是鏡子，從另一麪看是透明的） 返回 two-way mirror