关于pumice的百科

• pumice stone造句怎么写

• Ifyousufferfromtheseproblemsyoucanfilethemdownwithapumicestone.AccordingtoGerardKuiper,oftheUniversityofChicago,theescapeofgasesfromthemoon'smagmamayhavegiventhesatellitealight,porousconsistency,likethatofapumicestone.Chriswilloccasionallyrummagethr...
• 2018-03-2425576