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变火
释义
变火
biàn huǒ
相传古代钻木取火，一年之中，随着季节的变换，取火的木材也相应变换，称变火。语出《周礼．夏官．司爟》:司爟掌行火之政令，四时变国火以救时疾。郑玄注:郑司农说以鄹子曰:'春取榆柳之火，夏取枣杏之火，季夏取桑柘之火，秋取柞楢之火，冬取槐檀之火。'贾公彦疏:火虽是一，四时以木为变，所以禳去时气之疾也。孙诒让正义:谓五时各以其木为燧，钻以取火。《庄子．外物篇》云'木与木相摩则然'是也。
變火
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frequency modulated sound carrier
frequency-modulated sound carrier
frequency modulated speed scanning
frequency modulated station
frequency-modulated station
frequency modulated subcarrier
frequency modulated sub-carrier
frequency-modulated synchrotron
frequency modulated system
frequency-modulated system
frequency modulated telephony
frequency-modulated telephony
frequency modulated television signal
frequency-modulated television signal
frequency modulated television system
frequency-modulated television system
frequency modulated television transmission
Frequency Modulated Terminal
frequency modulated track circuit
frequency modulated transmitter
frequency-modulated transmitter
frequency modulated transmitter, FM transmitter
frequency modulated tube
frequency-modulated tube
frequency modulated voice frequency tele
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更新时间：2025/11/21 17:32:30