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