waterholes

1. 1.

   A depression in which water collects, especially one where wild animals come to drink.

   水坑(尤指野生动物饮水的洼地)

2. 2.

   A part of the electromagnetic spectrum, between the regions where hydrogen and hydroxyl radiate, that is relatively quiet in terms of radio astronomy.

   射电天文学上相对安静的电磁波谱区域,位于氢和羟基辐射区之间

射电天文学上相对安静的电磁波谱区域,位于氢和羟基辐射区之间；水坑；水眼

Connections

Learner notes