1. 瓯穴：根据地质考察,瓦尔登湖是瓯穴(Kettle hole)之湖,出身的高贵彰显了她的与众不同--在10000多年前的冰河时代消融末期,巨大的冰块留了下来,融化的纯净晶莹的水就盛在这30米的深坑容器中,清澈的地下水不断地补给,充沛的雨水洗去了浮物尘埃,

2. 锅形陷洞,锅穴,壶穴：kettle depression == 锅形陷落 | kettle hole == 锅形陷洞,锅穴,壶穴 | Kettler-Drude dispersion equation == 凯特勒-德鲁德色散方程

noun

1. (geology) a hollow (typically filled by a lake) that results from the melting of a mass of ice trapped in glacial deposits

Synonym: kettle