/ˈflʌktʃueɪt ||; ˈflʌktʃυˌet/verb [I] fluctuate (between A and B) (used about prices and numbers, or people's feelings) to change frequently from one thing to another （指价格、数字或情绪）波动，起伏: The number of students fluctuates between 100 and 150. 学生的数目在100和150之间上落不定。 ➔fluctuation /ˌflʌktʃuˈeɪʃn ||; ˌflʌktʃυˈeʃən/ noun [C,U]