Word · Frequency #29495
RF
释放因子
releasing factor
- 1.
n a substance produced by the hypothalamus that is capable of accelerating the secretion of a given hormone by the anterior pituitary gland；n a radioactive transuranic element which has been synthesized；n a complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone
射频；测距计
𬬻（Rf）；网状结构；射频；测距计
In use
RF is widely used in remote controls and wireless microphones.
The router sends an RF signal that can pass through walls.
Engineers measure RF to check that a new device will not interfere with other equipment.
RF + noun
RF 作定语时表示“射频的”，通常大写。
RF signals can pass through walls.
射频信号可以穿过墙壁。
RF + stands for + [full form]
用于解释缩写的含义。
RF stands for radio frequency.
RF 代表射频。
Rf + be + noun phrase
此义中 Rf 是化学元素符号，注意 R 大写、f 小写。
Connections
Collocations
- rf signal
- 射频信号
- The rf signal is too weak to detect.射频信号太弱，无法检测。
- rf amplifier
- 射频放大器
- This rf amplifier boosts the signal before transmission.这个射频放大器在传输前放大信号。
- rf interference
- 射频干扰
- The speaker emits rf interference that disrupts the radio.扬声器发出射频干扰，干扰了收音机。
- rf module
- 射频模块
- The rf module connects the device to the wireless network.射频模块将设备连接到无线网络。
- rf circuit
- 射频电路
- He designed an rf circuit for the antenna.他为天线设计了一个射频电路。
- rf radiation
Learner notes
Memory Tip
RF是Radio Frequency的缩写，想象收音机调台时接收射频信号的样子，记住'射频'。
Context & Register
语域：formal 常见场景：技术文档、学术论文、专业报告 rf 是缩写，通常用于技术或学术类书面语境；如果指“射频”，多出现在通信、电子工程等专业领域，日常口语中较少单独使用。
Pronunciation & Spelling
这些词都以 -rf 结尾，但拼写相同不代表发音相同。缩略词 rf 通常读作两个字母 R-F /ˌɑːrˈɛf/，因此与它们都不押韵。其中 surf、turf、serf 押韵，读 /ɜːrf/；dwarf、wharf 押韵，读 /ɔːrf/；scarf 读 /skɑːrf/，不与其他词押韵。
Dictionary facts from ECDICT, WIKTIONARY.