1. 夜间：night-walking noctambulation == 梦行症 | nighttime == 夜間 | nighttime visual range == 夜视距离

2. 昼夜：.白天[Daytime | .昼夜[Nighttime | .日常的[Day-to-day

3. 夜间,夜里,在夜间：nighttide,夜潮,夜间,夜里 | nighttime,夜间,夜里,在夜间 | sunset,傍晚,日落,衰微,晚年

4. 夜里：nightstool 卧室用便器 | nighttime 夜里 | nighttimenightime 夜间

noun

1. the time after sunset and before sunrise while it is dark outside

Synonym: nightdark