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)。
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