Spiracles of most insects can close to keep things like dust out.
大多数昆虫紧密气门，防止灰尘进入。
The spiracles of most insects can close to keep things like dust out.
大多数昆虫紧密气门，防止灰尘进入。
Flies, like all insects, breathe through many tiny openings called spiracles.
苍蝇，和所有昆虫一样，通过无数微小的气门来进行呼吸。
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。
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。
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