Nedymium
铵
🗣️ 情景例句
Are all the classes within walking distance?
所有的教室都在步行范围之内吗？
It is probably only the flu (influenza).
可能只是流行性感冒吧。
He lands on top of each house and climbs down the chimney into the fireplace.
他降落在每一家的房顶，顺着烟囱爬进壁炉。