By contrast, the audience encounters an opera or a play over a specific time, which is the duration of the performance.
相反，观众可以有一段具体的时间来欣赏话剧或者戏剧，这段时间就是表演的持续时间。
In contrast of the two methods' results, this paper attempts to find reasonable plan duration and make reasonable proposals to the original project duration plan.
对比两种方法的计算结果，尝试找到一个合理的计划工期，对工程原工期计划提出一定的建议。
Methods QRS duration and frontal plane QRS axis were measured before and after injection of contrast medium in 34 patients with left coronary artery disease identified by coronary angiography.
方法观察34例经冠状动脉造影确诊为左冠状动脉狭窄而右冠状动脉无病变的冠心病患者，注射造影剂前后QRS时间和额面电轴的变化。
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