Gǔdài de shāngrén pà yùdào qiángdào, yìbān bù gǎn yèxíng.
Merchants in the past were afraid of meeting robbers and seldom dared to travel at night.
Tips
usage
夜行 mostly appears in set terms: 夜行动物 'nocturnal animal', 夜行性 'nocturnal' in biology, and 夜行军 'a night march'. Its opposite in biology is 昼行性 'diurnal'.
