托福詞彙

cloud of gas and dust in space

星雲

joining light atomic nuclei into heavier nuclei

核融合

move along a gravitationally bound path

繞軌道運行；環繞運行

move repeatedly about an equilibrium position

振盪；來回擺動

moving component fitting inside a cylinder

活塞

major nearly round body orbiting a star

行星

energy associated with position or configuration

位能

rate of energy transfer or work

功率

grooved wheel guiding a rope or belt

滑輪；皮帶輪

send incident light back from a surface

反射

change light direction through change of optical medium

折射；使折射

exert a force pushing an object away

排斥；產生斥力

enhanced response to driving near a natural frequency

共振

turn about an axis

旋轉；使旋轉

turning motion about an axis

旋轉；自轉

ratio of capacity to expected demand in design

安全係數

natural or artificial object orbiting a larger body

衛星

moon blocks part or all of sun from observers view

日食

sun and objects gravitationally associated with it

太陽系

mechanical disturbance traveling through a medium

聲；聲音

vehicle designed to travel or operate in space

太空船；太空載具

rate of distance traveled without direction

速率；速度的大小

self gravitating luminous body sustained by fusion during active life

恆星

force or action that a structure must support

結構載重；結構負載

powerful stellar explosion

超新星；超新星爆發

instrument collecting radiation from distant objects

望遠鏡

pulling force transmitted through a stretched member

張力；拉力

planet with a rocky solid surface

類地行星；岩質行星

turning effect of a force about an axis

力矩；扭矩