All the genotypes with low invasion percentage were from southern China and most of them belonged to Spanish type.

低侵染率花生种质均来自南方生态区的珍珠豆型材料。

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But the invasion of lightning surge may lead its failure due to its low voltage withstand level which may affect the normal service power system.

微机保护系统是电力系统的重要组成部分，但由于其耐压水平低，雷电波侵入电源系统时易导致设备的损坏，严重影响了电力系统的正常运行。

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The tumor displayed the character of low echo (21/32), obscure boundary(22/32), vascular invasion (26/32), pancreatic duct and common bile duct dilation (19/36).

结果超声内镜下胰头癌主要表现为边界不清晰（22/32）的低回声（21/32），伴有胆总管和胰管的扩张（19/36）、血管的侵犯（26/32）；

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