虽然爬行动物身上通常都有鳞片，但翼龙的皮可能有很多毛。
Although scales typically cover reptiles, the pterosaurs probably had hairy coats.
科学家说，他们终于明白一个巨大的史前翼爬行动物，翼龙，能够飞起来的原因了。
Scientists say they finally understand how a giant prehistoric winged reptile, the pterosaur, was able to fly.
壮志与爱心为伟大行动之两翼。
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