A caterpillar's guts move forward first, followed by its outer body, according to X-ray studies of the insects walking on a treadmill. Molly Webster reports.
把毛毛虫放在跑步机上，再用X射线对其研究，我们发现它的内脏先向前走，然后整个身体才移动。
A caterpillar's guts move forward first, followed by its outer body, according to X-ray studies of the insects walking on a treadmill. Molly Webster reports.
把毛毛虫放在跑步机上，再用X射线对其研究，我们发现它的内脏先向前走，然后整个身体才移动。
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