If water had a negative index of refraction, then a straw placed in a glass would appear to bend back under itself.
如果水具有负折射率,那么放在玻璃杯中的吸管似乎可能弯曲到自身下方。
This photograph is reproduced as a negative to show the glass image as a positive.
这张照片被复制成正片一样,实际上是显示玻璃影象的负片。
To differentiate the volumes theglass front of the each box is a slightly different tint of green and the negative space between boxes is clear glass.
为区分盒子的大小,盒子的玻璃幕墙分别采用稍显不同的绿色,而盒子之间则用了无色的玻璃。
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