他不以为然地说到他父亲是一个孤独的人。

He speaks deprecatingly of his father as a lonely man.

《柯林斯英汉双解大词典》

他是一个孤独的老人，只有他的狗陪伴着他。

He's a lonely old man who only has his dog to keep him company.

youdao

弟弟认为，一个孤独无助的女孩想要毫发无伤的穿过这野外的荒原是根本不可能的。

The younger brother believes that it is impossible for a lonely and helpless maiden to pass through the wilderness without any harm.

youdao

According to the Second Brother, it's virtually impossible for a single, helpless maiden to pass uninjured in this wild, surrounding waste.

弟弟认为，一个孤独无助的女孩想要，毫发无伤的穿过这野外的荒原是根本不可能的。

耶鲁公开课 - 弥尔顿课程节选

And then I think it was two days later,a week later, I came across another quote of somebody saying, Oh,we all die alone.

然后两天还是一周之后，我又看见另一个引言，说我们将孤独而死。

耶鲁公开课 - 死亡课程节选

In fact, Yeats is still writing about a solitary fisherman.

实际上，叶芝所写的还是,一个孤独的渔夫。

耶鲁公开课 - 现代诗歌课程节选