“directional beam”的概念、定义、翻译、参考文献-科学参考

单词	directional beam
释义	directional beam [dǝ`rek·shǝn·ǝl `bēm] ^{ELECTROMAGNETISM} A radio or radar wave that is concentrated in a given direction.
随便看	dump routine dump scow dump tank dump truck dump valve dumpy level cybotaxis cybrid Cycadales Cycadatae Cycadeoidaceae Cycadeoidales Cycadicae Cycadofilicales Cycadophyta Cycadophytae Cycadopsida cyclamate cyclane Cyclanthaceae Cyclanthales cyclase cycle cycle annealing cycle-bound program

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