The reason of the strengthening of severe wind belt of low layer is due to the dynamicforce effect of upper layer jet and the transporteffect of air particle of low latitude.
低空强风带的加强一方面由于高空急流的动力强迫作用，另一方面来源于低纬空气质点对强风动量的输送作用。
2
HHTM, including both heterostructure effect and nonstationary transporteffect such as velocity overshoot effect, expends much shorter calculating time than Monte-Carlo method.
HHTM既包含了异质结效应，又包含了高场输运中的速度过冲等非稳态输运效应。
3
They appear to have had little effect on the price of gasoline at the pump, as ethanol represents only about 6 percent of the nation’s transport fuel today.