常見(jiàn)例句Of or belonging to the infraclass Eutheria, a division of mammals to which all the placental mammals belong. 真哺乳亞綱的關(guān)於或?qū)凫恫溉閯?dòng)物真獸亞綱的一個(gè)下綱，包括有胎磐哺乳動(dòng)物Of or belonging to the infraclass Eutheria,a division of mammals to which all the placental mammals belong. 真哺乳亞綱的關(guān)於或?qū)凫恫溉閯?dòng)物真獸亞綱的一個(gè)下綱，包括有胎磐哺乳動(dòng)物Any mammal of the infraclass Marsupialia, characterized by premature birth and continued development outside the womb. 有袋目哺乳動(dòng)物的統(tǒng)稱，特徵爲(wèi)生出未成熟的胎兒，在子宮外繼續(xù)發(fā)育。of or belonging to the infraclass Eutheria,a division of mammals to which all the placental mammals belong 關(guān)於或?qū)凫恫溉閯?dòng)物真獸亞綱的一個(gè)下綱，包括有胎磐哺乳動(dòng)物 返回 Infraclass