Ferroselenium
硒铁
🗣️ 情景例句
At 4, but I have to leave by 3:00 to get there on time.
四点，不过我三点必须离开，才能准时到那里。
Fortune is fickle.
天有不测风云，人有旦夕祸福。
But none of them has been turned to stone yet!
但到目前为止还没有一个变成石头呢！