VOA慢速英语:Eyes in the Sky Map Amazon on the Ground

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

tenfold – adj. ten times as much or many

laser – n. a device that produces a narrow and powerful beam of light that has many special uses in medicine, industry, etc.

spectroscopy – n. using a tool to measure different properties of light.

assess – v. to make a judgment about (something)

reflect – v. of light, sound, etc. to move in one direction, hit a surface, and then quickly move in a different and usually opposite direction

infrared – adj. producing or using rays of light that cannot be seen and that are longer than rays that produce red light

shortwave – n. a radio wave with a wavelength between 10 and 100 meters

canopy – n. the highest layer of branches in a forest or on a tree

conservation – n. the protection of animals, plants, and natural resources