High insect density, high attacked trees rate, middle crowded degree.
第类，高虫口密度、高被害株率、中拥挤度。
Under soil drought stress lamella structure of chloroplast wrenched obviously and there was a black area, which had high electron density in the middle of chloroplast.
在土壤干旱胁迫下，叶绿体的片层结构发生严重的扭曲并在中央部分形成电子密度较高的黑色团块物质。
Methods: To analyze 1185 cases CT plain scan and observe the circs of high density sign of middle cerebra artery. Some cases were examined by TCD.
方法：对1185例头颅平扫片进行分析，观察大脑中动脉高密度征出现情况，并对部分病例行经颅多普勒(TCD)检查。
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