Ccsa
[计] 公用控制交换网
🗣️ 情景例句
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A little body often harbours a great soul.
莫道身躯小，伟人寓其间。
New York is built on a group of islands on the east coast of the USA at a point where several rivers flow into the ocean.
纽约市建立在美国东海岸的一群岛屿上，那儿是好几条河流入海的交汇点。