Cef
[医][=centrifugation extractable fluid]离心提取液
🗣️ 情景例句
He knows everything about the production schedule,
他知道生产进度的一切情况，
A work ill done must be twice done.
未做好的活，需要重新做。
There's a zoo in the park. We can go and have a look at the animals.
公园里有个动物园哩。我们可以去看看动物。