In some cases, the file system can be in such bad shape that the operating system boots into single user mode to allow the user to further the repair process.
而在某些情况下,当文件系统损坏严重时,操作系统会启动到单用户模式,由用户进行进一步的修复。
Basically the simplest answer is that you need to measure a sufficient number of points so that you can uniquely describe the mode shape.
大致说来最简单的回答是,你需要测量足够多的点,这样你就可以唯一地描述模态振型了。
We can quickly see that some of the mode shape information is strongly controlled by the exterior of the structure.
我们很快可以发现,某些模态振型信息是由结构外部极大地支配的。
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