Certainly a little narrow face, with hard eyes, had flashed up for an instant from a hole, and was gone.

确实有一张窄窄的小脸，露着严厉的目光，在一个洞里闪了一下，就不见了。

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The Woods Hole study found that many Marine animals like mollusks and corals that build hard shells and skeletons are most at risk from this.

伍兹·霍尔海洋学研究所的研究发现，许多海洋动物，如生长硬壳和骨架的软体动物和珊瑚是最危险的。

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It's a hard, uphill hole in any circumstances.

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Once the hole is large enough, thread the hard drive cable through.

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