VOA慢速英语:水下机器人帮助保护珊瑚礁

spine – n. line of bones going down the center of the back that provides support for the body and protects the spinal cord

predator – n. animal that hunts and kills other animals for food

coral reef – n. long line of coral that lies in warm, shallow water (coral: a hard material formed on the bottom of the sea by the skeletons of small creatures)

spear – n. pole with a sharp point at one end that is used as a weapon

toss – v. throw

plot – v. map out plans for direction