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primary biliary cirrhosis
primary carbon
primary cell wall
Primary charge roller
primary code
primary amenorrhea
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primary active transport
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primary bare area
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原生裸地
primary bare area
网络释义
primary bare area
原生裸地
原生裸地
（
primary bare area
）——发生在原生裸地上的演替称为原生演替或初生演替。次生裸地（secondary bare area）—…
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primary bare areaprimary bare areaprimary bare area