Whitlockite
白磷钙矿[石]
🗣️ 情景例句
Excuse me. Is this seat taken?
对不起 ，请问这个座位有人吗？
He that gains well and spends well needs no account book.
收支正当，无须记帐。
But every night he heard the noise upstairs.
但每天晚上他都听到楼上的声音。