Bisdn
[计] 宽带综合业务数字网
🗣️ 情景例句
It is OK to ask children how old they are.
问小孩多大了是可以的。
Old wood is best to burn,old horse to ride.
老柴好烧，老马好骑。
Our next obstacle was a shallow pool of water about half a mile across.
下一个障碍是一片约半英里宽的浅水塘。