vacillation英美网络 摇摆; 优柔寡断; 踌躇; 波动; 动荡复数:vacillations TOEFLBNC.32687 / COCA.30662英英释义nounchanging location by moving back and forthSynonym:swingswingingindecision in speech or actionSynonym:hesitationwavering双语例句