Polyphosphazenes
[化] 含磷氮链聚合物
🗣️ 情景例句
As I told you before, my door is always open.
正如我以前跟你说的一样，我们的门永远都是敞开的。
Not let the grass grow under one's feet.
不失时机。
He asked very politely, Excuse me, have you got any books about the moon and the stars?
“请问，你有关于月亮和星星的书吗？”