For the buffer processing, the MFC treats a zero-size data request as a no-op, so I can go ahead and issue requests even if there is no data to read.
对于缓冲区处理，MFC 将大小为零的数据请求当作无操作来对待，所以即使没有数据可读取了，也可以继续发出请求。
So, no matter how you say it, this is always zero. So, in a way, this reinforces our intuition that del, even though it's not at all an actual vector sometimes can be manipulated in the same way.
因此，无论你怎么描述它，它总是0，那么在某种程度上，这加强了我们的直觉，即▽有时也可以用同样的方式计算,即使它并不是真正的向量。
It shows that DVR will inject small zero sequence component into the power system during compensation control even if there is no zero sequence circuit. This will influence the voltage on system side.
分析表明，即使系统不存在零序回路，DVR都会在补偿控制中向系统注入微小的零序分量，该零序分量会对无零序回路系统侧电压造成不良影响。
It shows that DVR will inject small zero sequence component into the power system during compensation control even if there is no zero sequence circuit. This will influence the voltage on system side.
分析表明，即使系统不存在零序回路，DVR都会在补偿控制中向系统注入微小的零序分量，该零序分量会对无零序回路系统侧电压造成不良影响。
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