Phosphonic
a. 膦的, 膦酸的
??? 情景例句
Well, hi, fellas.
你們大家好。
Won't you have a bit of this cake?
請(qǐng)嘗一點(diǎn)蛋糕吧！
We're out of one item on your order.
你我訂的貨里有一項(xiàng)我們沒(méi)有了，