Wf
abbr. 滤水器（Water Filter）；非同一型号的铅字（wrong font）
🗣️ 情景例句
They concluded that the goods were of good quality and proved no problem.
他们断定货物质地优良，并证明没有任何问题。
Factories employ both male and female workers.
工厂雇用男性和女性的工人。
Yes, they are.
是的。