nocturnal

柯林斯词典

1. ADJ Nocturnal means occurring at night. 夜间发生的
The dog's main duty will be to accompany me on long nocturnal walks. 那只狗的主要职责将是陪我走长途夜路。
2. ADJ Nocturnal creatures are active mainly at night. 夜间活动的
When there is a full moon, this nocturnal rodent is careful to stay in its burrow. 在有满月出现的时候，这种夜间出没的啮齿类动物小心地呆在它的洞里。