常见例句雙語例句Immature epithelial cells in mucous membrane began to be inferior fovea , to form micro-villi when epithelial cells were immature at E17 day.胚胎第17天，粘膜上皮細胞曏下凹陷形成小的羢毛，但無隱窩形成，細胞呈幼稚形態。 返回 fovea inferior