有关pumice的精选大全

用pumice stone造句子,“pumice stone”造句
Ifyousufferfromtheseproblemsyoucanfilethemdownwithapumicestone.AccordingtoGerardKuiper,oftheUniversityofChicago,theescapeofgasesfromthemoon'smagmamayhavegiventhesatellitealight,porousconsistency,like...
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