在冬季中期，我们可以判断一只背羽淡色而头部全白的大鸥一定是蒙古银鸥。

在冬季中期，我们可以判断一只背羽淡色而头部全白的大鸥一定是蒙古银鸥。的英文翻译

基本释义

• In the mid-winter period, a pale-mantled gull with an entirely white head really has to be Mongolian.