Niobium
n. 铌\\n[化] 铌Nb
✅ 同义词
🗣️ 情景例句
How much time will it take for my mail to get to where it is going?
我的信件到达它要去的地方要用多少时间？
To see a plane
看飞机
Not to grasp firmly is not to grasp at all.
抓而不紧等于不抓。