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单词 placoid scale
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Examples ofplacoid scale

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Their skin is smooth and largely covered by placoid scales, and their color can range from black to brownish gray.
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Placoid scales can not grow in size, but rather more scales are added as the fish increases in size.
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The body shape and structure of the trunk placoid scales indicate the ability to swim quickly.
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The entire body is covered by an exoskeleton of placoid scales.
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Many groups of bony fishes, including pipefishes and seahorses, several families of catfishes, sticklebacks, and poachers, have developed external bony plates, structurally resembling placoid scales, as protective armour.
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Sharks are entirely covered by placoid scales.
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Members of the elasmobranchii subclass have no swim bladders, five to seven pairs of gill clefts opening individually to the exterior, rigid dorsal fins, and small placoid scales.
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Such skins are naturally covered with round, closely set, calcified papillae called placoid scales, whose size is chiefly dependent on the age and size of the animal.
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Bony fish have no placoid scales.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

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更新时间:2025/1/14 16:43:33