VOA慢速英语:湄公河上的伊洛瓦底江海豚数量在增加

marine –adj. having to do with the sea

mammal – n. a warm-blooded animals that provides milk to its young

conservation –n. describing activities related to the protection of plants, animals and natural resources

species –n. a specific kind of plant, animal or other life that is able to reproduce itself

eliminate – v. to end; to remove from consideration

survey –n. an activity involving gathering information, usually from people, about something

tourism –n. traveling to a place for pleasure, the industry of providing for people who do this

iconic –adj. something that is a symbol, or sign that represents something larger