Pickeringite
镁明矾
🗣️ 情景例句
I've been trying
我一直努力
Do I have to reserve a seat?
我一定要预订座位吗？
we quickened our pace and made our way rapidly towards the stream where we hoped the boatman was waiting.
快速地朝深溪边走去，希望船夫还在那儿等着我们。