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The thorax and pleon bear a number of lateral appendages, including the gills, and the tail ends with a telson.

另一个古老特征是甲壳物分足,足在化石中三叶虫就已经有了。

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3G, 401(K), a,

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PBS球-物趣闻

They had thin, light-weight exoskeletons that helped them move faster, and flattened tails called telsons that gave them extra swimming power.

它们的外骨骼轻, 可以帮助它们更快,而被称为尾节的扁平尾巴则赋予它们额外的游泳能力。

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canavalin, canavanine, Canberra, canbyite, cancan, cancarixite, cancel, cancel out, cancelation, canceled,

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3G, 401(K), a,
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