Metalsorter
金属鉴别仪
🗣️ 情景例句
This has been a hard course for me.
这门课对于我来说很难。
A good beginning is half the battle.
首战告捷等于一半胜利。
We've got to report back to the head office.
我们还要回去向总部汇报情况呢。