Mulde
向斜层, 凹地
🗣️ 情景例句
Our toy company makes the most wonderful toys for kids.
我们玩具公司为小孩子们制造最棒的玩具。
No. Can't you see that rocket is almost falling down.
不。你不知道火箭快要倒下来了吗？
Give me a hand!
帮帮我！