Calcipulverite
钙质细屑岩
🗣️ 情景例句
At 4, but I have to leave by 3:00 to get there on time.
四点，不过我三点必须离开，才能准时到那里。
Do you have an appointment?
你有预约吗？
After crossing the Equator, the captain called in at a port to have a new rudder fitted,
跨越赤道后，船长将船停靠在一个港口，在那儿换了一只舵。