Sumidero
[西]落水洞, 封闭洼地
🗣️ 情景例句
Her eyes look so sad.
她的目光那么忧郁。
Thank you very much for saying that.
非常感谢你这样说，。
has spent his lifetime studying active volcanoes and deep caves in all parts of the world.
花了毕生的精力来研究世界各地的活火山和探洞。