暗墙；隐篱用来作栅栏，但又不阻碍视线或景观的护城河，或由墙围住的沟或陷入地中的篱笆。

A moat, walled ditch, or hedge sunk in the ground to serve as a fence without impairing the view or scenic appeal.

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如果研究人员能够识别暗墙上含有的化学元素，那么就能知道墙壁上涂了哪些颜色，从而得知暗墙的设计图案。

If researchers could tell which elements were on the hidden wall, they would know which colors were painted there and could make out the design.

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七个志愿者花了一个月的时间进行植入手术，然后报告已经可以分辨出较暗的墙和较量的窗户，也能分辨出黑色的桌子和白色的盘子。

The seven volunteers spent a month with the implants and reported being able to distinguish between dark walls and a light window, and a dark table and white plates.

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