Prefilter
预滤器
🗣️ 情景例句
I'm so sorry.
很抱歉。
A friend is never known till a man have need.
不到患难时，永远不能认识真正的朋友。
The meeting was scheduled for two hours, but it is not over yet.
会议原定了两个小时，不过现在还没有结束。