1
at night
表示在夜间时段，与白天对比。
She works at night.
她晚上工作。
夜晚；夜间
先理解核心含义，再看它在真实句子里的用法。
夜晚；夜间
the time when it is dark outside, between sunset and sunrise
She works at night.
她晚上工作。
也指法律或天文上定义的夜间时段
The time when the Sun is below the horizon when the sky is dark.
夜晚
the time after sunset and before sunrise while it is dark outside
The period of darkness beginning at the end of evening astronomical twilight when the sun is 18 degrees below the horizon, and ending at the beginning of morning astronomical twilight.
黑暗时期
a period of ignorance or backwardness or gloom
I work during the night and sleep during the day.
我晚上工作，白天睡觉。
AI contextual example
We stayed up all night talking about our plans.
我们整晚没睡，一直在谈论我们的计划。
AI contextual example
The nights are getting longer as winter approaches.
随着冬天临近，夜晚变得越来越长。
AI contextual example
I had a restless night
我度过了一个不眠之夜。
WordNet
表示在夜间时段，与白天对比。
She works at night.
她晚上工作。
强调在整个夜间期间发生的事。
It rained during the night.
夜间下了雨。
表示重复、连续多个夜晚。
He stayed up late night after night.
他夜复一夜地熬夜。
与by day相对，表示在夜间进行。
They travel by night to avoid the heat.
他们夜间旅行以避暑热。
Not this
I go to bed in night.
Use this
I go to bed at night.
中文母语者容易受到“在晚上”的干扰，误用介词“in”，但固定搭配中表示“在夜间”应该用“at night”。
Not this
Good night, everyone (when arriving at a party).
Use this
Good evening, everyone.
中文里“晚上好”和“晚安”对应不同场景，Good night 是告别语，Good evening 才是见面问候，学习者常混淆使用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
在夜间
Bats are active at night.
蝙蝠在夜间活动。
深夜
She often studies late at night.
她经常深夜学习。
夜班
He works the night shift at the hospital.
他在医院上夜班。
外出娱乐的夜晚
We had a great night out in the city.
我们在城里度过了一个愉快的夜晚。
夜空
The night sky was full of stars.
夜空中繁星点点。
黄昏；夜幕降临
They returned home at nightfall.
他们在夜幕降临时回到了家。
夜猫子
My brother is a night owl; he often studies until 3 AM.
我哥哥是个夜猫子，他经常学习到凌晨三点。
前夜
The night before the exam, she couldn't sleep.
考试前夜，她无法入睡。
夜深人静时
The burglars broke in in the dead of night.
盗贼在夜深人静时破门而入。
晚安，晚安！离别是如此甜蜜的悲伤。
She said, 'Good night, good night! Parting is such sweet sorrow.'
她说：‘晚安，晚安！离别是如此甜蜜的悲伤。’
那是一个黑暗而暴风雨的夜晚。
The story began with the line 'It was a dark and stormy night.'
故事以‘那是一个黑暗而暴风雨的夜晚’开头。
发长 /aɪ/ 音 (如 high, light)
Same pattern, same sound
Use night naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
night 拆解为 n（不）+ light（光），无光即夜晚。
语域：neutral 通常用于描述从日落到日出的黑暗时段，比较常见于日常对话和书面语。
Words ending with '-ight' typically rhyme when pronounced /aɪt/, such as light, bright, fight, might, right, sight. Beware of lookalikes like 'eight' and 'weight' (pronounced /eɪt/), which have a different vowel sound. Note that 'knight' is a homophone of 'night' but spelled differently.
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.