But the only choices hae been glass labware and a product called Matrigel, a gelatinous protein mixture secreted by mouse tumor cells.是什么意思_But the only choices hae been glass labware and a product called Matrigel, a gelatinous protein mixture secreted by mouse tumor cells.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句