贝加尔湖

A frozen lake is shown that appears quite blue. Many oval light-colored bubbles are frozen into the ice, many times in columns. Please see the explanation for more detailed information.
图中显示的是一片冰冻的湖泊，看上去相当蓝。许多椭圆形的浅色气泡被冻结在冰中，许多气泡呈柱状。有关更多详细信息，请参阅说明。