托福詞彙

planet outside our solar system

系外行星；太陽系外行星

interaction that can change motion or shape

力

motion under gravity without other significant forces

自由落體運動

number of repeated cycles per unit time

頻率

contact force opposing relative sliding or its tendency

摩擦力；摩擦

large gravitationally bound system of stars and other matter

星系

large planet composed mainly of hydrogen and helium

氣體巨行星

toothed machine part transmitting motion

齒輪

machine converting mechanical energy to electrical energy

發電機

gravitational interaction between physical bodies

引力；重力

operated by liquid pressure or flow

液壓的；水力的

resistance to change in velocity

慣性

limit electric current between objects or regions

使絕緣；進行絕緣處理

material strongly limiting electric charge movement

絕緣體；絕緣材料

energy associated with motion

動能

optical component redirecting light by refraction

透鏡

rigid member turning about a pivot

槓桿

visible electromagnetic radiation

光；可見光

distance light travels in vacuum in one year

光年

carrying structural forces in a design

承重的；承載的

energy emitted by a celestial object per unit time

光度；天體的輻射功率

field describing magnetic influence in space

磁場

quantity measuring inertia of an object

質量

relating to machines or physical forces and motion

機械的；力學的

ratio of output force to input force

機械利益；力的增益

sum of kinetic and potential energy

力學能；機械能

energy transfer by force along displacement

力學功；機械功

mass times velocity in classical mechanics

動量

change of position relative to a reference

運動