Mmtc
abbr. Minerals and Metals Trading Corporation 矿产和金属贸易公司; Mineral and Metals Trading Corporation of India, Ltd. 印度矿产五金贸易公司; Marine Minerals Technology Center 海洋矿物技术中心（美国矿物局）; maritime mobile telegraphy calling 海上流动电报呼叫
🗣️ 情景例句
Don't litter.
请不要乱扔东西。
I've had no time to prepare for this meeting, so I'll have to play it by ear.
我没有时间来准备这次会议，所以只好有什么说什么。
People said gold could easily be picked up by washing sand from the river in a pan of water.
据说，在一盆水里淘洗可沙就很容易找到金子。