n.

an utterance made by exhaling audibly

同義詞：suspiration

a sound like a person sighing

"she heard the sigh of the wind in the trees"

Sighs and gasps in a dish.
In rats, sighs correlate with relief.
Autonomic responses to sighs in healthy infants and in victims of sudden infant death.
Central respiratory pauses, sighs, and gross body movements during sleep in children.
Changes in lung mechanics following sighs in premature newborns without lung disease.
Respiratory variability preceding and following sighs: A resetter hypothesis
Vasoconstriction following spontaneous sighs and head-up tilts in infants sleeping prone and supine
Peripheral Vasoconstriction and Abnormal Parasympathetic Response to Sighs and Transient Hypoxia in Sickle Cell Disease
Reconfiguration of the neural network controlling multiple breathing patterns: eupnea, sighs and gasps
The development of stability of respiration in human infants: changes in ventilatory responses to spontaneous sighs