VOA慢速英语:Amazing Amazon Hides Atlantic's Coral Reef

coral – n. a hard material formed on the bottom of the sea by the skeletons of small creatures

dredging – v. the act of removing mud from the bottom a river (or lake, etc) in order to search for something

oceanographer – n. a person who studies oceans

plume – n. the area where the river meets the Atlantic Ocean and fans out on top of the ocean water

photosynthesis – n. the process where plants turn water and carbon dioxide into food when the plant is exposed to light

destructive – adj. something that causes a very large amount of damage

bleaching – n. the harmful process when coral losing their color—turning white— due to stress, because of warming waters