The two dimensional pseudohomogeneous model was often used for the non isothermal, non adiabatic fixed bed reactor that was widely used for the strongly exothermic reactions.

非温非绝热固定床广泛用于强放热体系。

It is an established convention to speak of the fixed stars as a standard unaccelerated reference frame .

把固定成是标准非加速参照系，这是一种已经确立习惯。