英文句子~10分

1.校長的突然辭職震驚了整間學校
2.as soon as news of the tragedy was announced, shockwaves spread rapidly to all parts of the country.
3.衝擊波
P.S.通常作shock waves

1.校長突然離職使全校感到震驚。
2.Shockwaves--Shock waves transmitted by earthquakes.
3.Shockwaves--a movement of a very high air pressure caused by eg.explosion

1.The sudden resignation of the Principal sent shockwaves through the school
主要被送的衝擊波的突然的辭職通過學校
2.A shock wave (or simply "shock") is a type of propagating disturbance.
3.A shock wave (or simply "shock") is a type of propagating disturbance. Like an ordinary wave, a shock wave carries energy and can propagate through a medium (solid, liquid or gas), or, in special cases, through a field such as the electromagnetic field in the absence of a physical medium. Shock waves are characterized by an abrupt change (a discontinuity) in the characteristics of the medium. Across a shock there is always an abrupt rise in pressure, temperature and density of the flow. However, it is not possible to have a decrease in these properties across a shock wave.ref In supersonic flows, expansion is achieved through an expansion fan. A shock wave travels through most mediums at a higher speed than an ordinary wave.

Unlike solitons (another kind of nonlinear wave), the energy of a shock wave dissipates relatively quickly with distance. Additionally, the companion expansion wave from a shock approaches, and eventually merges with the shock, partially cancelling it out. Thus the sonic boom associated with the passage of an aircraft is the sound wave resulting from the degradation and merging of the shock-wave–expansion-wave pair produced by the passage of a supersonic aircraft.

Although the total energy is preserved when matter is processed by a shock wave, the available energy which can be extracted as work is decreased (Entropy is increased). This has the practical effect, for example, that an aircraft with shocks will experience an additional drag force to that which it would experience if the flow was shockless.