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

strengthen a structure with added support or material

補強；加固

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

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