undamped wave无: not have; there is not; be w ...衰减: attenuation; decay; damping; ...波: wave衰减波: damped wave; decaying wave; decreasing wave; evanescent wave无衰减: zero decrement; zero-decrement下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:无衰减波,即可在微信中查询翻译