Petalage
n. [總稱](一朵花的)花瓣
??? 情景例句
Grandpa,
爺爺，
Beauty is but skin deep.
美麗只是皮相（指：不能以貌取人）。
Cave exploration, or pot-holing, as it has come to be known, is a relatively new sport.
洞穴勘查——或洞穴勘探——是一項比較新的體育活動。