Rf
射频, 测距计, 测远仪\\n[计] 射频
🗣️ 情景例句
Hello. Susan Stewart calling Mr. Levine, please.
喂 ，Susan Stewart想跟Levine先生通话。
First come, first served.
捷足先登。
It is as if a single unimportant event set up a chain of reactions.
好像是一件无关紧要的小事引起了一连串的连锁反应。