fish migration鱼类: fish回游: migration; run回游鱼类: dromous fishes; migratory fishes鱼类回波积分器: fish echo integrator回游: [动物学] migration; run 产卵回游 spawning migration; 索饵回游 feeding migration; 回游幼鲑 herling下载手机词典可随时随地查词查翻译