inertia /iˈnə:ʃə/ n. ［u］ 1.不活动，惰性：a feeling of inertia on a hot summer day 热天的惰性感 2.惯性：the law of inertia 惯性定律Inertia carried the car to the pavement. 惯性使汽车驶上了人行道。