The Dynasty Change from Ming to Qing was the final Dynasty alternation in Chinese feudal society.
明清易代作为中国封建社会最后一场朝代更替，此际思想演变十分错综复杂。
ST-T wave alternation in ECG for a part of cases before treatment was not aggravated obviously after medication.
部分患者治疗前心电图呈ST - T波改变，服药后无明显加重。
Lung tissue sections stained by HE were observed to study morphological alternation in terms of MLI, MAN and PAA.
肺组织切片观察形态学改变，采用图像分析系统测定肺平均内衬间隔(MLI)、平均肺泡数(MAN)和肺泡腔面积与总面积比(PAA)。
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