该解决方案把热水从发电厂抽上来，通过地下管道至热交换器，热交换器在二级分配网络上将水加热，然后将它流入用户的散热器系统。
The solution pumps hot water from a power plant through underground pipes to heat exchangers which heat up water in the secondary distribution network and feed it into consumer radiator systems.
LOGSECOND——主日志文件占用满时，可以分配的二级日志文件的个数。
LOGSECOND - Total number of secondary logs that can be allocated when the primary logs fill up.
DB 2配置参数LOGSECOND指定了在需要时可以动态分配的二级日志的最大数量(高达254)。
The DB2 configuration parameter LOGSECOND specifies the maximum number (up to 254) of secondary logs that can be allocated dynamically when needed.
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