她意识到自己孤单一人，心里感到很不安。

It disturbed her to realize that she was alone.

他感到又危险又孤单。

He felt unsafe and alone.

他离开后我感到非常孤单。

I felt so lonesome after he left.

在陌生的城镇里只身一人，我感到不知所措、孤单寂寞。

I feel lost and lonely in a strange town alone.

她一生中从来没有感到如此孤单，如此无助。

Never in her life had she felt so alone, so abandoned

尽管他俘获过很多女人的芳心，却依然孤单寂寞。

Despite his conquests, he remains lonely and isolated.

26分钟之后他一瘸一拐地走出来，显得孤单凄凉。

He looked a forlorn figure as he limped off after 26 minutes.

我总是害怕孤单一人。

I've always been petrified of being alone

在那一个个漫长、孤单的夜晚，我极需找点事做。

I desperately needed something to occupy me during those long, lonely nights.

我很孤单，很难过。

I am lonely and I am hurting.

我现在不得不孤单一人度过余生。

I now have to face the rest of my life as a single person

我身处伦敦市中心比驾船航行于茫茫大海更感到孤单。

I feel lonelier in the middle of London than I do on my boat in the middle of nowhere.

他的朋友很少，因此生活很孤单。

He has so few friends that his life is very lonely.