Rf
射频, 测距计, 测远仪\\n[计] 射频
🗣️ 情景例句
If someone doesn't buy it before then,
如果在此之前没有人买走的话。
The eyes of the nation are upon the government.
国民的目光都注视着政府。
After a great many loud explosions, the race began.
在好一阵喧闹的爆炸声之后，比赛开始了。