夜行
night walk; night departure; nocturnal
野性
wild nature; unruliness
夜行昼伏
to travel at night and lie low by day (idiom)
商业行为
business activity; commercial activity
梅西耶星表
Messier catalog of nebulae and clusters (1784)
梅西叶星表
Messier catalog of nebulae and clusters (1784)