late 15c., from Old French nocturnal "nightly, nocturnal," or directly from Late Latin nocturnalis, from Latin nocturnus "belonging to the night," from nox (genitive noctis) "night," cognate with Old English neaht (see night) + -urnus, suffix forming adjectives of time. Nocturnal emission "involuntary ejaculation during sleep" first recorded 1813.
实用例句
1. The dormouse is a shy, nocturnal creature.
榛睡鼠是一种在夜间活动的胆小动物。
来自《权威词典》
2. When there is a full moon, this nocturnal rodent is careful to stay in its burrow.
月圆之夜，这种夜间活动的啮齿类动物会小心地呆在地洞里不出来。
来自辞典例句
3. Nocturnal animals such as bats and owls only come out at night.
夜行动物,如蝙蝠和猫头鹰只在夜里才出来.
来自辞典例句
4. The usual symptoms are dyspnea, and sometimes paroxysmal nocturnal dyspnea.
其常见症状是呼吸困难, 有时呈阵发性夜间呼吸困难.
来自辞典例句
5. I wander about the dread nocturnal countryside of this inhuman season.
