他紧张得开始过度呼吸，医生建议他慢慢深呼吸来缓解。

He started ___hyper-ventilating from stress, and the doctor advised him to take slow deep breaths.

她在紧张时开始过度呼吸，不得不坐下来休息。

She started ___hyper-ventilating from anxiety and had to sit down to rest.