他们感叹天气太热了。

They sigh that the weather is too hot.

她感叹地说：“这真是太难了。”

She sighed and said, This is really hard.

他深深地感叹了一声，然后继续工作。

He let out a deep sigh and then continued working.

她听到坏消息后，忍不住感叹了一声。

She couldn't help but sigh after hearing the bad news.

每次回到故乡，我都会感叹物是人非。

Every time I return to my hometown, I sigh that things have remained the same, but people have changed.

每次看到旧照片，他都会感叹时光飞逝。

Every time he looks at old photos, he sighs at how time flies.

我发出了悲哀的感叹。

I sent a sad sigh.

我也只能感叹我海拔太低。

I can only sigh I altitude is too low.

恋爱是感叹吹起的一阵烟；

Love is the season Yizhenyin sigh;

“多可爱啊，”他感叹道。

'How lovely,' he said with a sigh.