Sintropac
加铜铁粉; 铁铜混合粉末
🗣️ 情景例句
I'll hold on to them for you.
我为你保管吧。
No man ever yet became great by imitation.
笑颦不能成西施。
This time he pointed to the lake.
这次他用手指了一下那个湖。