脑干高倍镜显示，脑梗死可同时伴有下行束沃勒变性。
Cerebral infarctions can be accompanied by Wallerian degeneration of descending tracts, as shown here at high power in the brainstem.
理论分析和计算机仿真都表明，星敏感器的测量精度和焦距，下行信号光的束散角将影响激光链路成功建立概率。
Theory analysis and computer simulation show that the precision and focus of star tracker, the divergence angle of down beam influence the probability of laser link setting up.
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