There are exceptional circumstances to be taken into account.
有些不同寻常的情况需要考虑。
Even a permanent system would be used only in exceptional circumstances.
即便是永久性的系统也只会在例外的情形之下才会被使用。
The circumstances at these companies were surely exceptional, or so one would hope.
这两家公司的情形实属例外，又或者是众望所归。
The circumstances at these companies were surely exceptional, or so one would hope.
这两家公司的情形实属例外，又或者是众望所归。
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