No doubt, at some time during sanding, it was discovered that the pumice not only acted as an abrasive but filled the wood grain at the same time.是什么意思_No doubt, at some time during sanding, it was discovered that the pumice not only acted as an abrasive but filled the wood grain at the same time.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句