A solitary and nocturnal animal, it is not often seen in the wild.

这是一种夜行独居动物，在野外甚少看到。

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The solitary reef fish often travels aloneor in pairs and favors a diet of sponges and sea squirts.

这种独居的礁鱼常常独自或成对游荡，喜欢吃海绵和海鞘。

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TV watching, often a solitary activity, is an obvious candidate for some social tips.

通常作为个体活动的看电视显然是某种社交窍门的备选项。

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But the critics point out that the inventions that have done most to change the world often come from solitary experimenters, corporate renegades and other oddballs.

ECONOMIST: The law on patents

Cells used for solitary confinement are often windowless, but this one had a ribbonlike window that was seven inches wide and five feet tall.

NEWYORKER: Hellhole

His lawyers have often expressed concern about his health in the past, usually demanding that he be moved out of solitary confinement.

BBC: Abdullah Ocalan is serving a life sentence for treason