hyperventilate

◊ When you hyperventilate you breathe so quickly that you begin to feel dizzy. Hyperventilate is also sometimes used figuratively to describe a person who is becoming very upset or excited but not actually breathing quickly.过度呼吸时，由于呼吸过快会感到头晕。Hyperventilate有时也用作比喻，用于描述某人感到不安或兴奋，但并非真的呼吸急促。