Suddenly, there appeared a hole in their nest. The cold wind blew in through the hole and got away the warm air from the nest.

突然，他们的巢里出现了一个洞。冷风从洞里吹进来，把巢里的暖空气吹走了。

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When he had turned the Angle of the gallery, the distant glimmer of an air-hole disappeared, the curtain of obscurity fell upon him once more, and he became blind again.

当他转过了巷角以后，远处通气洞的光线就消失了，黑幕又在他前面落下，使他再次失明。

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Given a lattice symmetry, larger absolute photonic band gap was achieved by selecting an air hole shape of the same symmetry.

给定晶格对称结构，选择具有相同对称形状的空气孔能得到较大的绝对光子带隙。

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