“perennial stream”的概念、定义、翻译、参考文献-科学参考

单词	perennial stream
释义	perennial stream [pǝ`ren·ē·ǝl `strēm] ^HYDROLOGY A stream which contains water at all times except during extreme drought.
随便看	variable-length word variable-mu tube variable nebula variable parameter variable-pitch propeller variable point variable radio-frequency radiosonde variable recoil variable reduction variable-reluctance microphone variable-reluctance pickup variable-reluctance stepper motor variable-reluctance transducer variable-resistance accelerometer variable resistor variable-sequence robot variable speech control variable-speed drive variable-speed generator variable-speed motor variable-speed scanning variable star variable-thickness microbridge variable-time fuse variable-transconductance circuit

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