It's unknown whether the lava is residual material that's draining through the underground tube system or if the flow is still being supplied by lava from the crater, scientists say.
科学工作者们说，不知道熔岩是否是地下管道系统排出的残留物质，或者是否火山口的熔岩仍然在提供流量。
2
A residual analysis was used to identify other predictors of satisfaction with the health-care system.
使用残差分析确定预测医疗系统满意度的其他因子。
3
Heat removal system, residual heat removal and safety system functional failures.