Gagarinite
軟煤
??? 情景例句
If you can't get a cab, give me a call. It's not safe to walk home along at night.
如果你叫不到出租車的話，打電話給我，晚上一人走回家不安全。
Don't mention it. I hope you can come again soon.
不用謝，希望你不久能再來。
How did the bees know exactly in which diection to fly?
蜜蜂是怎樣確切地知道朝哪個方向飛呢？