英汉例句雙語例句Objective To observe the expression of pulmonary surfactant-associated protein D (SP-D) during human fetal lung development.目的觀察肺表麪活性物質相關蛋白-D（SP-D）在人胚胎肺發育成熟過程中表達的特征。pulmonary surfactant protein d更多例句词组短语短語pulmonary surfactant associated protein d 表麪活性物質相關蛋白dpulmonary surfactant protein d更多词组