比如第一场第二次镜头。
场致发射过程中，二次电子发射现象不可忽视。
In the process of field emission, the secondary electron emission is inevitable.
流体势场是控制油气二次运移的主要因素。
以截面法向涡量为基础，可求解得到与涡量对应的二次流速度场。
Secondary flow velocity can be obtained with respect to cross suction normal vorticity.
以截面法向涡量为基础，可求解得到与涡量对应的二次流速度场。
Secondary flow velocity can be obtained with respect to cross suction normal vorticity.
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