One may render a database completely useless should he back it up at the filesystem level.
如果在文件系统级进行备份，就可能使数据库完全失效。
The second lesson is that some valuations are completely useless for picking Asian stocks.
第二个经验是，在亚洲，某些估值指标对选股完全无益。
The bearing for motor was not so bent as to be completely useless. We only required it to be re-aligned.
电动机轴承弯曲，但没有严重到不能使用，我们只要求重新对直。
Yes, finally Google Maps Mobile isn’t completely useless when you lose a signal (which might be when you need it most).
没错，当你收不到信号的时候（并且可能是你最需要它的时候），GoogleMaps不再是垃圾了。
Which subjects at school do you think will be completely useless to you in the future? Which ones do you think will be important to you?
你认为学校里哪门课对你来说在将来是完全用不上的呢？那么哪门课对你又是重要的呢？
However, if a completely useless profile is applied (does a pilot even make catering orders?), clicking the Remove button will be more appropriate.
然而，如果应用了一个完全无用的文件(这个引航员给出了命令吗？)，点击Remove按钮将会更合适。
He added that the U. S. still has the illusion that it can intimidate China with military threat, but in fact, such an approach is "completely useless".
尹卓还表示，美国在南海仍幻想利用军事威胁的方式影响中国，但事实上这种行为对中国“一点作用没有”。
S obs. Now it is crying because it spend thousands of years thinking it was completely useless, and wasted all this time blaspheming God and its destiny.
现在是哭，因为它要花几千年来的思想是完全没用，浪费时间，这一切，亵渎上帝和自己的命运。
Now as an aside, I'll admit this is a completely useless program, much like the first couple of ones we did because why would you write a program just to solve this?
说点题外话，我承认这是一个完全无用的程序，跟我们之前写的两个程序一样,我们为什么需要写个程序来解决这个数学运算呢？
Unfortunately this information is completely useless: you never need to know the mouse position relative to the screen - well, maybe only if you want to place another window at the mouse position.
很不幸的是这一信息毫无用处：你永远不需要知道鼠标相对于屏幕的位置，除非你想在鼠标的位置放另一个窗口。
However, something not very well documented is almost useless unless you devote a great amount of time in exploring it completely.
然而，某些没有非常完善文档的工具几乎没法用，除非你愿意花大量的时间对其进行彻底的探索。
It took another hour to empty it completely, throw away the useless items, and sort the remainder in piles according to whether or not he would need them from now on.
他又花了一小时才把箱子彻底清空，扔掉没用的东西，剩下的根据以后是否需要分成了几堆。
It took another hour to empty it completely, throw away the useless items, and sort the remainder in piles according to whether or not he would need them from now on.
他又花了一小时才把箱子彻底清空，扔掉没用的东西，剩下的根据以后是否需要分成了几堆。
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