五家公司的发言人都不愿意表态，或者不愿意立即表态。
Spokespeople at all five companies either declined to comment or were not immediately available.
公司通常无法或者不愿意投入大量的必要时间和资金来克服这些缺陷。
Often companies are unable or unwilling to invest the significant time and money necessary to overcome these obstacles.
不过，报告认为，数百万在国内流离失所的人仍然无法或者不愿意返回家乡。
But it says millions of internally displaced people are still unable or unwilling to return home.
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