Ncec
[医][=National Clearinghouse on Environmental Carcinogenesis]全国环境致癌作用情报交流所
🗣️ 情景例句
We will help your children in learning lessons in their free time.
我们可以帮助您的孩子在他们空闲时学习功课。
The mining area is centered large in the north.
那里的采矿区大部分集中在北部。
He has often described to me how he picked up a masterpiece for a mere $50.
他多次向我详细讲他如何只花50英镑便买到一位名家的杰作。