每个按需扫描请求都是单线程的，需要使用一个会话Bean对其进行封装。

Each on demand scan request is single-threaded, and you need a session bean to encapsulate it.

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由于每个按需扫描都是单线程的，因此将创建会话Bean来封装nessus类，以向Portlet提供会话接口。

Because each on demand scan is single-threaded, a session bean is created to encapsulate the Nessus class to provide the session interface to the portlet.

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运用交流阻抗(EIS)法和单线性扫描(lsv)法研究X70钢在乳酸溶液中的腐蚀行为，乳酸浓度和温度对X70钢腐蚀行为的影响。

Corrosion behavior of X70 steel in lactic acid solutions with different concentration and different temperature was investigated by means of EIS and Linear Sweep Voltammetry (LSV).

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