delayed echodelayed telemetry迟到: 5分钟 be five minutes late反射波: reflected wave; return wave; ...反射波: reflected wave; return wave; back wave; echo反射反射波: reflection; reflexion反射波阵面，反射波前: reflected wavefront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:迟到反射波，即可在微信中查询翻译
