就像我之前说到的，铀铅年代测定法已经存在一段时间了。
Like I said before, Uranium-Lead Dating has been with us for a while.
以生存时间做为研究的主要测定结果。
The main outcome measure of the study was duration of survival.
不同采血方式在相同时间点采血测定的大鼠血清睾酮含量存在差异。
Blood collection at the same time in different ways may influence the testosterone secretion.
作业时间测定是制定标准作业时间的重要途径之一。
Operation time measurement is one of the important ways to give standard operation time.
目的：探讨凝血酶原时间测定的部分影响因素。
Objective: to investigate the part influence factors of prothrombin time assay.
自身抗体要在不同的时间点测定。
The antibodies need to be measured at more than one time point.
尽管由于时间的原因，本研究未能完成后面的酶活力测定等。
Although the time of the reasons behind this study failed to complete the activity measurements.
尽管由于时间的原因，本研究未能完成后面的酶活力测定等。
Although the time of the reasons behind this study failed to complete the activity measurements.
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