noun🔗Share浮石，火山岩。 A light, porous type of pyroclastic igneous rock, formed during explosive volcanic eruptions when liquid lava is ejected into water or air as a froth containing masses of gas bubbles. As the lava solidifies, the bubbles are frozen into the rock."The geologist carefully examined the piece of pumice, noticing its light weight and many tiny holes. "地质学家仔细检查了那块浮石，注意到它非常轻，而且有很多细小的孔洞。geologymaterialsubstancenaturescienceChat with AIVocabulary GamePractice Reading
verb🔗Share用浮石擦磨，用浮石磨光 To abrade or roughen with pumice."She used a pumice stone to pumice the calluses on her feet. "她用浮石打磨，来用浮石磨掉脚上的老茧。materialgeologyactionChat with AIVocabulary GamePractice Reading
