When it increases, these types of indicators go from a normal, to a warning, to an alarm state.
当日志利用率增长时，这些类型指示器的状态从正常变化到提醒、报警。
2
A zero-sales situation might set off alarm bells—but the ringing phone feels like a normal interaction, not a failure.
零销售额为零还有可能会为你敲响警钟——而电话铃却让你觉得是种正常交流，并非失败。
3
A slight drop in cabin pressure as the shuttle climbed into the sky raised an alarm, but engineers attributed it to normal expansion that allowed some oxygen to escape.