Periostracum
n. (软体动物介壳的) 角质层
🔁 扩展释义
【医】 外壳膜
🗣️ 情景例句
I don't know,
我不知道，
Beauty is but skin-deep.
红颜易变。
Maori families are often large, and uncles, aunts, grandparents and other relations may come to stay with the family for long periods.
毛利人的家庭通常很大，叔伯、婶娘、爷爷奶奶以及其他亲戚均可来与家里人长时期地住在一起。