The diluted blood sample can be moved back and forth through the reaction Chambers until blood clots.
稀释后的血样可以通过反应室前后移动，直到血液凝结。
That seemed clear enough, but things got tricky when the nonwhite ancestor was a grandparent or a great-grandparent and the minority blood became increasingly diluted.
这看来够清楚了吧，但当非白人祖先是祖辈或曾祖辈，少数种族血统越来越稀释时，情况又变得微妙起来。
Our assumption is that these men have more blood volume, so PSA gets diluted, he said.
他说：“我们的假设是，这些人有更多的血量，所以PSA被稀释了”。
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