While Dr.Meltzer has been working, his assistant has scraped it thin and has sewn it into a closed tube, using a large syringe cover as a support.是什么意思_While Dr.Meltzer has been working, his assistant has scraped it thin and has sewn it into a closed tube, using a large syringe cover as a support.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句