在向量处理器上，寄存器可以作为一个单元进行处理，也可以作为多个单元进行处理。
On vector processors a register is treated both as a single unit and as multiple units.
第一单元学得叉积、法向量这些,现在就有用了。
The first unit about cross-products,normal vectors and so on is actually useful now.
扰动因子向量的方向与材料单元体应力主方向相同。
The orientation of disturbance factor vector is the same as that of vector of material unit stress.
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