Petrographic
a. 岩相学的；岩类学的
🗣️ 情景例句
to go over to the construction site with me?
去看一看建筑工地吗？
Do you have any brothers or sisters?
你有兄弟或姐妹吗？
He believed that everyone should be prepared to do heavy work, from the leaders to the poorest peasants.
他认为从领袖到最穷苦的农民，每个人都该乐于从事重体力劳动。