... in case of necessity除非必要 out of sheer necessity出于不得已 under the necessity of doing sth不得已而做某事,有做某事的必要 ...
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如果你迈出了下一步，如果你进化到了另一个层面，那不是出于不得已，而是求仁得仁。
If you do get to the next step, if you evolve to the next level, it's because you want to, not because you have to.
如果出于不得已的原因需要为很多程序添加某个路径，那么也可以修改系统的默认搜索路径。
If you have a compelling reason to add a path to many programs, you can also change the system's default search path.
我知道有许多人一直这样生活，是逼不得已，而不是出于自愿。
I realize many people live like this all the time, by necessity, not by choice, and I anticipate letters saying, "Boo hoo!"
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