Ahlfeldite
复硒镍矿
🗣️ 情景例句
But I was lucky enough to have a career as a music teacher
但我很幸运， 有一个音乐教师的事业
That's a very nice jacket.
这件茄克衫真漂亮呀！
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。