concretions
Any crocodylian of the clade Loricata. / Any marine mollusc of the class Loricata; Polyplacophora.
synchrotron radiation
plural of concretion
the act of making Hungarian.
地質学者は岩石に埋まっている小さな硬くなった鉱物の塊を露出させるために注意深く削り取った。
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