Pnni
[计] PNNI标准
🗣️ 情景例句
Western countries have evry strict visa requirements.
在西方国家有严格的签证要求。
My head has been hurting.
我头痛。
Some of this heat near the earth's surfact is used to make electricity.
靠近地表的一部分热量已被用来发电。