常見例句雙語例句One hypothesis suggests that by closing tiny breathing-valves in their exoskeletons called spiracles, insects prevent evaporation.有一種假說認爲(wèi)崑蟲可以通過關(guān)閉外骨骼上微小的呼吸閥門（氣孔）來防止蒸發(fā)。 返回 breathing valve