Prf
n. pulse-repetition frequency的简 写
🗣️ 情景例句
have become good friends, haven't you?
成了好朋友，不是吗？
The cruelest lies are often told in silence.
最残酷的谎言常以沈默的方式说出。
Over a year passed before the first attempt was made.
然而一年多过去了才有人出来尝试。