Polyfluorination
多氟化反应
🗣️ 情景例句
I have to postpone our appointment.
我要把我们的约会延期。
I missed my train.
我未赶上火车
but as a special favour, he would let me have it for $30.
作为特别优惠，他愿意让我出30英镑成交。