TOEFL 어휘

cloud of gas and dust in space

성운

joining light atomic nuclei into heavier nuclei

핵융합

move along a gravitationally bound path

궤도를 돌다; 공전하다

move repeatedly about an equilibrium position

진동하다; 앞뒤로 반복해서 흔들리다

moving component fitting inside a cylinder

피스톤

major nearly round body orbiting a star

행성

energy associated with position or configuration

위치 에너지

rate of energy transfer or work

일률; 출력

grooved wheel guiding a rope or belt

도르래; 벨트 풀리

send incident light back from a surface

반사하다

change light direction through change of optical medium

굴절하다; 굴절시키다

strengthen a structure with added support or material

보강하다; 구조를 강화하다

exert a force pushing an object away

밀어내다; 척력을 발생시키다

enhanced response to driving near a natural frequency

공진; 공명

turn about an axis

회전하다; 회전시키다

turning motion about an axis

회전; 자전

ratio of capacity to expected demand in design

안전 계수

natural or artificial object orbiting a larger body

위성

moon blocks part or all of sun from observers view

일식

sun and objects gravitationally associated with it

태양계

vehicle designed to travel or operate in space

우주선

rate of distance traveled without direction

속력; 속도의 크기

self gravitating luminous body sustained by fusion during active life

별; 항성

force or action that a structure must support

구조 하중

powerful stellar explosion

초신성; 초신성 폭발

instrument collecting radiation from distant objects

망원경

pulling force transmitted through a stretched member

장력; 인장력

planet with a rocky solid surface

지구형 행성; 암석형 행성

turning effect of a force about an axis

토크; 돌림힘