To breathe deeply and audibly as a result of fatigue, sorrow, etc.

长叹；叹息。

To long; yearn; grieve.

渴望；渴慕；悲悼。

To make a sound like sighing.

啸。

To express by sighs.

叹息地说。

A deep, audible respiration, expressing sorrow, anxiety, etc.

叹息、长叹(表示悲哀、忧虑等)。