this means that if one of the disks fails, the entire raid is rendered inoperable, with unrecoverable loss of data.
这意味着假如其中一块硬盘发生故障了,整个raid不可操作,并且不可挽回数据损失。
inadequate technology in tunnel excavation shall result in instability of surrounding rocks and even lead to collapse and failure of them and cause unrecoverable loss of economy and time.