Fluoniobate
氟铌酸盐
🗣️ 情景例句
I've been in China to work on the new project.
我一直在中国搞一个新项目。
How's your nephew?
你的女儿好吗？
Dressed in dark glasses and old clothes, they had taken special precautions so that no one should recognize them.
他们戴着墨镜，穿着旧衣裳，特别小心以防别人认出他们。