VOA慢速英语:北方海豹种群在意想不到的地方繁殖

pup - n. one of the young of various animals other than dogs

vent - n. an opening through which air, steam, smoke, liquid, etc., can go into or out of a room, machine, or container

stable - adj. a good state or condition that is not easily changed or likely to change

beach - n. an area covered with sand or small rocks that is next to an ocean or lake

catastrophic - adj. involving or creating sudden damage or danger

eruption - n. a sudden explosion that sends out rocks, ash, lava, etc...