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This smacks of unjustified optimism .

这其中有不合理的乐观意味。

I regard class distinctions as unjustified and , in the last resort , based on force .

我认为阶级区分是不正当的，其最终的达成方式常常诉诸暴力。

Though not wholly unjustified , it glides over a history filled with many disappointments .

尽管不是完全不公正，回顾历史还是充满了失望。

Yet this additional gloom is unjustified even though the diplomatic mood is bleak .

不过，尽管外交氛围低迷，这种额外的担忧是没有确凿证据的。

Critics think this gives the american authorities unjustified powers , for example to boot undesirable websites off the internet .

批评家认为，这种模式赋予了美国官方不正当的权力，比如说，把不良网站从互联网上清除掉。