Pentafluorination
五氟化反应
🗣️ 情景例句
You asked to see me.
你要求见我。
We certainly expect our product to be available by October 1.
我们的产品在可在10月1日前准备好。
He did very badly on the exam----worse than expected almost the worst in the class.
他考的不好，比期望的还糟。几乎是全班最差的。