Cytotoxicity of poly-lactic-acid internal fixation composing bone powder was examined by MTT colorimetry and cell morphology test in vitro.是什么意思_Cytotoxicity of poly-lactic-acid internal fixation composing bone powder was examined by MTT colorimetry and cell morphology test in vitro.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句