单词	潦河流域
释义	潦河流域 Liaohe basin
随便看	observatical observating observation observation- observat ion observa-tion observation ability observation-ability observation about observation accuracy observation adjustment observation aeroplane observation-aiming system observation aircraft observation airplane observational observational ability observational accuracy observational adequacy Observational angle RVI observational approach of marketing research observational astronomy Observational Astrophysics observational aviation observational behavior