... sporangium 孢子囊 spore coal 孢子煤 spore coloration index 孢子染色指标 ...
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Compared with gymnospermae pollen, the fern spore has a more closer relationship with soluble organism in the low-rank source rocks from the coal-bearing strata.
而蕨类孢子和裸子植物花粉相比，可能对低熟-未熟油，特别是含非烃较高的低熟油有某种更为密切的联系。
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