During the late Palaeozoic period, colossal insects dominated the air. One such creature, Meganeuropsis permiana, mirrored today's dragonflies but stretched over 70 centimeters across its wings and tipped the scales at 100 grams. Scientists have long questioned why contemporary insects never reach such proportions. Three decades back, a theory emerged called the "oxygen limitation theory."
更窄的缝隙意味着更高的支撑网强度，在屏幕展开时能为上层柔性材料提供更强支撑，使折痕不再那么“凹陷”。
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