R-f preselectors
[电] 射频预选器
🗣️ 情景例句
What would you say is the most popular sport in your country, Mr. Lu?
陆先生，你们国家什么运动最流行？
The lone sheep is in danger of the wolf.
孤独的羊难免遭狼的危险。
We need seven of these.
我们要七个这种的。