F-f cavity preselector
[电] 射频空腔预选器
🧩 词语组成解析
[计] 预选器, 预选程序
🗣️ 情景例句
You'll feel better after a good night's sleep.
你好好睡上一觉就会好些。
On a crowded train, one comes in contact with many people.
在拥挤的火车里面，会和许多人接触。
He lands on top of each house and climbs down the chimney into the fireplace.
他降落在每一家的房顶，顺着烟囱爬进壁炉。