物理（1）

旁白 neutral

Everything we can see and touch is made up of matter

我们看到和触摸到的所有物品都是由物质构成的。

旁白 neutral

In a vacuum , light travels at its maximum speed of approximately 300 ,000 kilometers per second

在真空中，光以约每秒30万公里的最大速度传播。

旁白 neutral

The three phases of matter are solid , liquid and gas

物质的三种状态分别是固态、液态和气态。

旁白 neutral

Gold is solid , but when you heat it , it becomes liquid

金子是固体，但当你给它加热时，它就会变成液体。

旁白 neutral

The rubbing alcohol evaporated as soon as the nurse dabbed it on the patient's arm

当护士把外用酒精涂在病人手臂上时，它就蒸发了。

旁白 neutral

The population density is very high in eastern coastal regions of Australia

澳大利亚东部沿海地区的人口密度很大。

旁白 neutral

The failure of the experiment was due to exclusion of gravity

试验失败的原因是忽略了重力作用。

旁白 neutral

Astronauts must reach a certain velocity to escape Earth's gravitational pull

宇航员必须达到一定速度才能摆脱地球的引力。

旁白 neutral

The intensity of the earthquake was so great that it caused widespread destruction

地震的强度极大，造成了广泛的破坏。

旁白 neutral

Friction between two sticks can create a fire . / The wheel has been expired due to friction

两个棍子相互摩擦能生火。/轮子因摩擦而报废了。

旁白 neutral

He feels the pressure soon after he takes up the job

他开始工作不久后就感受到了压力。

旁白 neutral

In physics , velocity is a vector that includes both speed and direction

在物理学中，速度是包含速率和方向的矢量。

旁白 neutral

In hot weather the temperature gets very high

炎热的天气里气温非常高。

旁白 neutral

Conduction of heat through metal occurs when particles vibrate and transfer energy

热量通过金属传导时，粒子振动并传递能量。

旁白 neutral

Heat radiated from the stove ./ His smile on the face radiates his confidence

热量从炉子里散发出来。/他脸上的微笑流露出他的信心。

旁白 neutral

Friction between two sticks can create a fire . The wheel has been expired due to friction

两个棍子相互摩擦能生火/轮子因摩擦而报废了。