contemporary topics 1 vocabulary 7朗文英语听说教程一

Unit 7 Are We Alone

Galaxy n. large groups of stars and planets

Approximately adv. A little more or less than an exact number or amount

Light year n. the distance that light travels in one year

Locate v. to find where something is

Telescope n. an object that lets you see things that are far away

Radio telescope

Range n. the distance that something can reach or travel

Signal n. sounds that tell you something; A signal is a gesture, sound, or action which is intended to give a particular message to the person who sees or hears it. Investigate v. to search for information about something

Restrict v. control or limit

Be restricted to

Being n. people or living things

Possibility n. capability of existing or happening or being true

Intelligent adj. having the capacity for thought and reason especially to a high degree

intelligence

Intelligent life

Universe n. The universe is the whole of space and all the stars, planets, and other forms of matter and energy in it.

Extraterrestrial adj. originating or located or occurring outside Earth or its atmosphere n. a form of life assumed to exist outside the Earth or its atmosphere

planet n. (astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order of their proximity to the sun; viewed from the constellation Hercules, all the planets rotate around the sun in a counterclockwise direction

imagine v. form a mental image of something that is not present or that is not the case; expect, believe, or suppose

Alpha Centauri n.brightest star in Centaurus; second nearest star to the sun 半人马座阿尔法星

Rocket n. a jet engine containing its own propellant and driven by reaction propulsion

Space dust空尘，太空尘埃

Float v. stay on the surface of liquid or air

Direction n. a line leading to a place or point