这个问题可以使用多焦点人工晶体来解决，它拥有一些同心圆环，该圆环上的物质能提供交替调节近距离和远距离视力的区带。
That can be addressed with multifocal lenses, which have concentric rings of material that offer alternate bands of near and distant vision.
原因不明大便带血及粘液或腹泻，便秘交替，原因不明的血尿。
Unexplained blood and mucus in stool, or alternate of diarrhea and constipation, and unexplained hematuria.
实际上，复交替投影神经网络不仅可用于信号处理中的带限信号外推，还可用于选频、陷波等场合。
In practice complex alternating projection neural networks can be widely applied to signal processing, such as band-limited signal extrapolation, frequency selector and trap filter.
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