基本解释n. 先入为主;全神贯注;极为忙碌(等于preoccupation)同根派生 preoccupancy相关词英汉例句Occupation of a place in advance;preoccupancy. 抢先占据预先对某地的占据;先占Occupation of a place in advance; preoccupancy. 抢先占据预先对某地的占据;先占preoccupancy, 先占(全神贯注),音标preoccupancy更多例句专业释义医药科学全神贯注