Nacrum
(=nacre)珍珠质
🗣️ 情景例句
She has a high reputation as a writer.
她是个有名气的作家。
Wake up and smell the coffee!
面对现实吧！
And anyone who gave more than a passing thought to the bottom confines of the oceans probably assumed that the sea bed was flat.
凡是稍稍想过大海海底的人大概都会认为海底是平坦的。