Nioboxy
铌氧基
🗣️ 情景例句
He's running for the school board.
他正在竞选联合校董会董事。
I will be very glad when I receive the letter.
如能接到你的来信，我将会非常高兴。
But they would not listen to him. When they came to the river, a white man was waiting in the boat for them.
但是他们不听，当他们来到江边时，一个白人正在船上等着他们。