基本解释呼吸阀 [鱼] 呼吸瓣 通气阀英汉例句双语例句One hypothesis suggests that by closing tiny breathing-valves in their exoskeletons called spiracles, insects prevent evaporation.有一种假说认为昆虫可以通过关闭外骨骼上微小的呼吸阀门（气孔）来防止蒸发。