Cissoid
凹边的,蔓叶线的
🗣️ 情景例句
If you're under twenty-one years of age ...
如果你还不到二十一岁……
It's no sin to sell dear, but a sin to give ill measure.
高价卖不为过，短斤少两才有罪。
but he was in such a bedraggled condition than an assistant refused to serve him.
但店员见他浑身泥水的样子，竟不肯接待他。