If no one is there to respond to the console selection prompt on boot, then after some period of time the system will continue booting without a console.
如果在引导时没人响应控制台选择提示，那么经过一段时间之后，系统会继续引导，但是没有控制台。
2
Thus, the lack of a prompt response to glucocorticoids might reflect a higher degree of thyrotoxicosis and thyroid destruction (10), which requires a longer period of glucocorticoid administration.
Analysis the prompt state in the course of the experiment through time-section method. Adjusts the time space in transition period to make it into a steady state soon.