ROC的三C——construct，compose，constrain是按照先后顺序加进来的。
The three "C"s of ROC - construct, compose, constrain are applied in that order.
日志级别按照它们在配置文件出现的先后顺序进行设置，对于相同的配置项，后面出现的配置会覆盖前面出现过的设置。
The levels are applied in the order they are defined in the configuration file.
日志级别按照它们在配置文件出现的先后顺序进行设置，对于相同的配置项，后面出现的配置会覆盖前面出现过的设置。
The levels are applied in the order they are defined in the configuration file.
应用推荐