Thus, our picture of Venus at around the time life was getting started on Earth is one of warm oceans, probably rich with organic molecules, splashing around rocky shores and volcanic vents.
2019年6月六级真题（第二套）听力 Section C
柯林斯高阶英汉双解学习词典释义
N-COUNT
通风孔;排气口
A vent is a hole in something through which air can come in and smoke, gas, or smells can go out.