Sideroferrite
木化石中发现的天然铁
🗣️ 情景例句
No, thank you.
不用 谢谢你。
He insisted that we all be in his office at one o'clock.
他要求大家一点钟到他的办公室。[大学英语四级]
I know.You must help me do the cooking this afternoon.
我知道。今天下午你得帮帮厨。