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be deep in sth
deep in 后接表示状态的名词。
She was deep in thought.
她陷入沉思。
深；深深地
先理解核心含义，再看它在真实句子里的用法。
深；深深地
Far down or into something, physically or figuratively.
She was deep in thought.
她陷入沉思。
深深地,尤指向下穿过或进入某物,字面或比喻上。
Far, especially far down through something or into something, physically or figuratively.
深刻地,而非肤浅地。
In a profound, not superficial, manner.
大量地。
In large volume.
向己方球门、底线或类似区域的后方。
Back towards one's own goal, baseline, or similar.
She stared deep into the forest, searching for any sign of movement.
她深深地凝视着森林，寻找任何动静的迹象。
To understand the poem, you must read deep between the lines.
要理解这首诗，你必须深入解读字里行间的意思。
The diver went deep beneath the surface to explore the coral reef.
潜水员深入水面以下去探索珊瑚礁。
deep in 后接表示状态的名词。
She was deep in thought.
她陷入沉思。
We need to dig deep to find the truth.
我们需要深挖以找出真相。
Deep down, she knew she was right.
在内心深处，她知道自己是正确的。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
深入到……中；持续到很晚
They talked deep into the night.
他们谈到深夜。
在内心深处；实际上
Deep down, she knew he was right.
在内心深处，她知道他是对的。
陷入沉思
He sat by the window, deep in thought.
他坐在窗边，陷入沉思。
熟睡的；酣睡
The cat is deep asleep on the sofa.
猫在沙发上睡得很沉。
在……之下很深的地方
The submarine must go deep under the ice.
潜艇必须潜到冰层之下很深的地方。
在内心深处；实际上
Deep down, she wanted to forgive him.
在内心深处，她想原谅他。
竭尽全力；深挖
We'll need to dig deep to meet the deadline.
我们必须竭尽全力才能赶上最后期限。
深入探讨；深入到…之中
The interview went deep into his childhood experiences.
那次采访深入探讨了他的童年经历。
静水流深。
This proverb is often said about a calm person, meaning that their feelings run deep.
这则谚语常用来形容平静的人，意思是他们感情深厚。
夜晚的星星又大又亮，就在得克萨斯州的腹地深处。
This lyric from the song 'Deep in the Heart of Texas' uses 'deep' to mean far inside the state.
这句歌词出自歌曲《深在得克萨斯心中》，其中该词表示深入该州境内。
发长 /iː/ 音 (如 see, free)
Use deep naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
deep的元音[i:]拉长，像往下探入深处，做动作时也“深深地”进行。
语域：mixed 常见场景：日常对话、叙事或文学写作、体育比赛报道 deep 作副词时,多用于固定搭配或具体场景中,表示“深深地、大量地、靠近底线”等;正式书面语中更常用 deeply,因此建议先掌握常见搭配再判断语境。
All six words rhyme with deep /diːp/: they share the spelling -eep and the sound /iːp/. Beware lookalikes that do not rhyme: dip /dɪp/, depth /depθ/, and deed /diːd/.
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WORDNET.