Conclusions: E-Tracking technology can be used to access the endothelial dysfunction of smokers, and it is a convenient, practical method.
结论：回声跟踪技术可早期发现血管内皮功能的改变，是一种简便、实用的方法。
The optoelectronic (0-E) precise tracking technology is a core technology in the field of navigation, test and control (TT&C).
光电精密跟踪技术是航空航天测控领域中的一项核心技术。
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