Tricalcic
三钙的
🗣️ 情景例句
a portrait of the United States--
一幅美国的剪影--
It is never too late to learn.
什么时候学习都不晚。
After you printed the book, you had to throw away the carved pieces of wood.
你把书印出后，不得不把刻过的一片片木板扔掉。