adj.夜的,夜间的;(动物)夜间活动的;(植物)夜间开花的;[乐]夜曲的;
例句:
This nocturnal creature is originally from a Nordic country.
这种夜间活动的动物最初生长在一个北欧国家.
Owls have nocturnal habits.
猫头鹰具有夜行性.
Psychic changes have been commonly observed, as well as daytime somnolence, nocturnal insomnia, and partial blindness.
普遍观察的有精神变化, 以及白天嗜睡, 夜间失眠和部分失明.