Davidite
鈾鈦磁鐵礦, 鈰鈾鈦鐵礦
??? 情景例句
Grandpa, when did Dad graduate from Michigan?
爺爺，爸爸是什么時候從Michigan畢業的？
Please sit down and have a glass of juice.
請坐下來喝一杯果汁。
This boy has no job.
這個男孩沒有工作。