Boundary river
[法] 疆界河流, 边界河流
🧩 词语组成解析
river
['rivə]
n. 河，江;溪，巨流;
🗣️ 情景例句
She called to say the plane was delayed.
她打电话回来， 告诉我们飞机误点。
He likes playing ping-pong.
他喜欢去打乒乓球。
What is it about?
这是关于什么的？