They were left alone there.

他们被单独留在那儿。

I am not alone in this opinion.

持此意见的不只我一人。

I don't like to go to the movies alone.

我看电影时不喜欢一个人去看。

She was alone as an opera singer.

做为歌剧演唱者，她是独一无二的。

He stands alone in his flying skill.

他的飞行技巧是无与伦比的。

He alone is not responsible for that.

那件事中只有他一人毫无责任。