Mitchellite
鎂鉻鐵礦
??? 情景例句
They talk about things like family, work, school or sports.
他們常常談論家庭，工作，學校或運動。
Nothing is impossible (or difficult) to the man who will try.
天下無難事，只怕不努力。
It was no use pretending that I had not seen him, so I waved to him.
若再裝作沒看見他已是沒有用了，我只好向他招手。