This is sometimes true in simple loops, but usually not in complex ones.
有时在简单的循环中的确如此,不过在复杂的循环中通常不是这样。
Since the feedback loops are not necessary, so it is simple and easy to execute.
由于无需光学循环,因此,它的结构简单而且易于实现。
Since the feedback loops are not necessary, so it is simple and easy to execute.
由于无需光学循环,因此,它的结构简单而且易于实现。
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