Mitchellite
镁铬铁矿
🗣️ 情景例句
my brother Robbie,
我弟弟Robbie
How about feed-back from your retailers and consumers?
你们的零售商和消费者的反映怎样？
The tunnel would be well-ventilated if tall chimneys were built above sea level.
隧道就具备了良好的通风条件。