VOA慢速英语:Water Robots Explore the Celtic Sea

biodiversity – n. the existence of many different kinds of plants and animals in an environment

satellite – n. a machine that is sent into space and that moves around the earth, moon, sun, or a planet

zooplankton – n. plankton composed of animals

two-dimensional -- adj. having or looking to have length and width, but not depth

wind turbine – n. a structure that has large blades attached to an engine and that is used to produce electricity

snorkel -- v. to swim and look underwater while breathing through a tube