延髓背侧正中沟: dorsal median sulcus of medulla oblongatasulcus medianus dorsalis medullae oblongatae
掌: Ⅰ名词1.(手掌) palm 短语和例子摩拳擦掌 rub one's fists and wipe one's palms2.(动物的脚掌) the bottom of certain animals' feet; pad 短语和例子熊掌 bear's paw; 鸭掌 duck's foot; 狗掌 dog's pad3.(人的脚掌) sole (of a human fo
