Briefly, APL provides primitives to select elements of vectors or sub-dimensions of multi-dimensional arrays with bit vectors of the same size (if you've worked with numpy and pytorch, this will seem familiar) like this:
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。新收录的资料是该领域的重要参考
She said they were unable to safely drink the flood water because they could be swept away and their main food source, worms, have been flattened or dried out by the rain.
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