物理名詞
Impulse
Physics The product obtained by multiplying the average value of a force by the time during which it acts. The impulse equals the change in momentum produced by the force in this time interval.
【物理學】沖量，推進力：力的平均值與它的作用時間相乘的結果。等于力在其作用時間段內(nèi)產(chǎn)生的動量的變化
Speeds
Physics The rate or a measure of the rate of motion.
【物理學】速率：運動的速率或限度
Air resistance
A force that tends to oppose or retard motion.
阻力：傾向于妨礙或阻滯運動的力量
Newton's Laws of Motion
http://www.physics4kids.com/files/motion_laws.html
Acceleration
Abbr.aPhysics The rate of change of velocity with respect to time.
縮寫a【物理學】加速度：速度相對于時間變化的速率
Mass
Abbr.mPhysics The measure of the quantity of matter that a body or an object contains. The mass of the body is not dependent on gravity and therefore is different from but proportional to its weight.
縮寫m【物理學】質(zhì)量：物體內(nèi)所包含的物質(zhì)的量。物體質(zhì)量不受重力影響，因此與物體的重量不同，但是與其成比例
Cancel
To neutralize one another; counterbalance:
抵消，中和：使彼此中和；抵消：
two opposing forces that canceled out./ ?cancel each other
Orbits
n.The path of a celestial body or an artificial satellite as it revolves around another body.
運行軌道：天體繞另一天體或人造衛(wèi)星繞一天體旋轉所運行的軌道
Events
Physics A phenomenon or occurrence located at a single point in space-time, regarded as the fundamental observational entity in relativity theory.
【物理學】事件：在時空中位于一點的現(xiàn)象或事件，被認為是相對論中基本的觀察實體
electromagnetic field
Physics A region of space characterized by a physical property, such as gravitational or electromagnetic force or fluid pressure, having a determinable value at every point in the region.
【物理學】場，磁場：有物理性質(zhì)，如引力或電磁力或液壓的空間區(qū)域，在此區(qū)域中每一點有一定值
Ether
1.Ether is a colourless liquid that burns easily. It is used in industry and in medicine as an anaesthetic.
...a sweetish smell of ether and iodine.
2.Physics An all-pervading, infinitely elastic, massless medium formerly postulated as the medium of propagation of electromagnetic waves.
【物理學】以太，能媒：一種在以前被假定為電磁波的傳播媒質(zhì)并具有絕對連續(xù)性、高度彈性的極其稀薄的媒體
cesium clock? 銫鐘
Coordinates
Mathematics Any of a set of two or more numbers used to determine the position of a point, line, curve, or plane in a space of a given dimension with respect to a system of lines or other fixed reference.
【數(shù)學】坐標：由兩個或多個數(shù)值組成的數(shù)組中的任一數(shù)值，用來在一個直線系統(tǒng)或其它固定參照數(shù)值方面決定點、直線、曲線或平面在已知范圍空間內(nèi)的位置
Alpha Centauri
n.a multiple star in Centaurus whose three components represent the brightest object in the constellation, 4.4 light-years from Earth.
半人馬座阿爾法星：人馬座中的聚星，其三個組成部分是星座中最亮的部分，距地球4.4光年
light cone? 光錐
n.a light cone is the path that a flash of light, emanating from a single event (localized to a single point in space and a single moment in time) and traveling in all directions, would take through spacetime.
Curvature
n.MathematicsThe ratio of the change in the angle of a tangent that moves over a given arc to the length of the arc.
【數(shù)學】曲率：切線通過給定弧線的角度變化與弧線長度之間的比率
