Samaria
[化] 氧化钐
🗣️ 情景例句
How did he get to be a department head so fast?
他怎么这么快就成为一个部门的主管？
She is free any time you need help.
你需要帮忙时，请随时向她求助好了。
Tazieff has often risked his life in this way.
塔捷耶夫经常冒这样的生命危险。