forced vital capacity test measuring the amount of air expelled after taking a deep breath peak expiratory flow rate measuring the highest speed of exhalation following a maximal inspiratory effort maximum expiratory/inspiratory pressure measuring abdominal and chest muscle strength arterial blood oxygen sat...
a diaeresis or a cedilla) placed above or below a written or printed letter to indicate different sounds (标於书面字母上方或下方以表示其不同发音的)变音符号(如重音符、 分音符或下加符).
a diaeresis or a cedilla) placed above or below a written or printed letter to indicate different sounds (标於书面字母上方或下方以表示其不同发音的)变音符号(如重音符、 分音符或下加符).