在位相显微镜下，这些细胞沿着毛细血管和小静脉壁缓慢滚动，最后停留在一定的位点。
Under phase microscopy, these cells appear to stumble slowly along the walls of the capillaries and venules to come finally to rest at some point.
一位交通专家告诉记者，就业的增长可能也起到了一定作用，再加上一些人通勤距离加长。
A transportation expert told the reporter that job growth likely plays a part as well, along with some people driving longer distances to and from work.
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