Superactinide
series [化]超锕系元素
🗣️ 情景例句
A friend in need is a friend indeed.
患难朋友才是真正的朋友。
What a beautiful sweater!
多漂亮的毛衣！
I have just received a letter from my old school, informing me that my former headmaster,
我刚刚收到母校的一封信，通知我说以前的校长