Ccsa
[计] 公用控制交换网
🗣️ 情景例句
Thank you.
谢谢 。
He gave me a chest X-ray and took my blood pressure.
他给我做了X光检查并且量了我的血压。
The towers are built on immense underwater platforms make of steel and concrete.
塔身建在巨大的水下钢盘混凝土平台上。