...，高血压的患病率随年龄的增加而增长，40岁后人群比15～39岁的患病率高3～4倍，特别是小儿高血压的轨迹现象(Tracking Phenomenon)说明高血压病人的升压趋势始于幼年，而幼年时基础血压水平的高低和以后随年龄升压幅度之间存在正相关关系。
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用追访血压Z值与初测血压Z值的相关系数描述轨迹现象的大小。
Tracking coefficient, defined as the correlation between follow up BP Z score and initial BP Z score, was described "tracking phenomenon".
月球引起了每个白天的潮汐，同时也给自己带来了副作用——它正沿着螺旋状轨迹慢慢的远离地球。这个可以用岩石和化石上的线索加以证明的现象，昭示了这颗卫星最初和最终的命运。
The moon is slowly spiraling away from Earth as it drives day-stretching tides, a phenomenon recorded in rocks and fossils that provides clues to the satellite's origin and ultimate fate.
可在钻进过程中起到修整井壁的作用，使井眼轨迹尽量达到理想状态，防止出现狗腿现象。
Making trajectory of borehole as far as possible to achieve ideal condition an preventing the phenomenon of dogleg .
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