Pumice, hu ua pumicite nyob rau hauv nws cov hmoov los yog hmoov av daim ntawv, yog ib lub pob zeb volcanic uas muaj vesicular ntxhib textured iav volcanic, uas tej zaum yuav los yog tsis muaj muaju. Nws feem ntau yog xim xim.
pumice siv rau dab tsi?
Pumice, ib qho ntxeem tau, frothlike volcanic iav uas tau siv ntev los ua ib qho abrasive hauv kev tu, polishing, thiab scouring compounds. Nws kuj yog siv los ua ib qho sib xyaw ua ke hauv precast masonry units, poured pob zeb, rwb thaiv tsev thiab acoustic pobzeb, thiab plaster.
Lub ntsiab lus ntawm pumice hauv lus Askiv li cas?
(pʌmɪs) uncountable noun. Pumice yog ib hom pob zeb grey los ntawm lub roob hluav taws thiab yog qhov hnyav heev. Nws tuaj yeem rubbed rau ntawm qhov chaw, tshwj xeeb tshaj yog koj cov tawv nqaij, uas koj xav ntxuav lossis ua kom smoother. COBUILD Advanced English Dictionary.
Lub ntsiab lus ntawm pumice hauv kev tshawb fawb yog dab tsi?
Pumice yog ib lub teeb pob zeb uas los ntawm pob zeb hluav taws kub. Tsim los ntawm lava, pumice yog ntxeem tau, los yog tag nrho ntawm qhov me me. … Lo lus los ntawm Latin pumex, uas qhia ib lub hauv paus nrog "ua npuas ncauj."
Pumice volcanic pob zeb yog dab tsi?
Pumice is a fine-grained volcanic rock. Nws yog lub teeb grey heev rau nruab nrab grey hauv xim. Nws muaj ntau cov pa npuas npuas, yog li nws yog lub teeb heev thiab zoo li zoo li daim txhuam cev. Qee zaum pumice yog lub teeb heev uas nws yuav ntab rau hauv dej. … Pumice yog tsim thaum volcanoes explosively.
