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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Scientists at the University of California at Riverside have found that molecules(6) that block UV radiation in sunscreen can, over time, penetrate(7) into the skin, leaving the outer body vulnerable.

加州大学河滨分校的科学家已经发现防晒霜中能阻挡紫外线辐射的分子时间一长就会渗透到皮肤里，使体表更容易受紫外线攻击。

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Ecto commensal: a commensal organism that lives on the outer body surface of another organism.

外共生体：生活在另一种生物体外表的共生生物。

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He says the outer parts of brown rice slow down the work of the body's digestive enzymes into starch.

VOA: special.2010.06.30

Qi Sun explains that the loss of the fiber-rich outer layer allows starch to be absorbed more quickly into the body.

VOA: standard.2010.06.25

The outer body of the EX-G1 is made from stainless steel to withstand external shocks while a polycarbonate cover absorbs shocks to the body side near the shutter.

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An externalized conductor occurs when the cable, or conductor, from inside the lead wears through the outer silicone insulation around the lead and appears outside the insulation body.

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It caused her outer skin layer to deteriorate and burn off, leaving at least 60 percent of her body as an open wound.

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