VOA慢速英语:科学家设计更为自然的机器鱼

lagoon - n. an area of sea water that is separated from the ocean by a reef or sandbar

shoal - n. a large group or number of fish

lily pad - n. a large, floating leaf of a plant (called a water lily) that grows in the water of a pond or pool

swarm - n. a very large number of things moving together

society - n. the people of a particular country, area, time, etc., thought of especially as an organized community

innovation – n. an intention; a new method or device

artificial intelligence – n. the power of a machine to copy intelligent human behavior

sonar – n. a communications and position-finding device used in underwater operations

battery – n. a device able to provide electrical current

sewer – n. a pipe or underground system used to carry away waste products and liquids