theoretically
/ˌθɪəˈretɪkli/ (bre, ipa) · /ˌθiːəˈretɪkli/ (ame, ipa) · /ˌthē-ə-ˈre-ti-k(ə-)lē ˌthir-ˈe-ti-/ (ame, mw)
theoretically — 副詞
1. used when describing a situation that should happen according to rules or princi
理論上
根據理論推斷但實際未必如此
used when describing a situation that should happen according to rules or principles, although it may not happen in real life
Theoretically, the new bus route should cut travel time by half.
理論上，這條新公車路線應該能把通勤時間縮短一半。
theoretically + expected outcome
The plan works theoretically, but the materials alone would cost far too much.
這個計劃理論上可行，但光是材料費就高得嚇人。
Theoretically, anyone can join the library, though membership is rarely granted to non-residents.
理論上，任何人都可以加入這間圖書館，不過非居民很少能取得會員資格。
Felipe explained that theoretically, the engine could run on vegetable oil instead of petrol.
Felipe 解釋說，理論上這台引擎可以用植物油代替汽油運轉。
Theoretically, the exam covers the whole course, but teachers usually skip several chapters.
理論上，期末考涵蓋整學期的內容，但老師通常會跳過好幾個章節。
- in theory
identical meaning; the adverbial phrase 'in theory' is more conversational
- hypothetically
suggests a speculative or imagined scenario rather than a rule-based one
- in principle
more formal; often used in legal, scientific, or policy contexts
- in practice
the most direct opposite — what actually happens versus what is supposed to happen
- actually
states a real situation rather than a rule-based expectation
文法句型
Theoretically, [clause]
[clause] theoretically, but [contradiction]
用法筆記
Frequently appears in sentences that contrast an ideal scenario with real-world limitations. Often paired with 'but', 'though', 'however', or 'in practice'.
常見錯誤
2. based on abstract ideas and principles rather than on real-world practice or dir
學理上
與抽象理論相關而非實際操作
based on abstract ideas and principles rather than on real-world practice or direct experience
Professor Ziad approached the problem theoretically rather than through hands-on experiments.
Ziad 教授從學理上探討這個問題，而非透過實際的實驗操作。
theoretically rather than [practical method]
Noa understood the dance theoretically but could not perform the steps correctly.
Noa 在理論上理解這支舞蹈，但無法正確做出舞步。
The book examines leadership theoretically, drawing on models from psychology and business studies.
這本書從學理上探討領導力，借鑒了心理學與商業研究的既有模型。
Tendai said the proposal was theoretically interesting but hard to apply in a real classroom.
Tendai 認為這項提案在學理上很有趣，但很難應用在真實的教室裡。
The course teaches grammar theoretically, with rules and charts rather than everyday conversation.
這門課從學理角度教授文法，用的是規則與圖表，而非日常會話。
- conceptually
focuses on concepts and mental frameworks rather than rules; often interchangeable
- abstractly
broader in meaning, can refer to any non-concrete thinking
- in principle
can overlap with both senses; in sense 2 it emphasises adherence to a framework of ideas
- practically
the direct opposite — doing things through hands-on experience
- empirically
based on observation and experiment rather than on theory alone
- concretely
focused on specific, tangible instances rather than general principles
文法句型
[verb] + theoretically
theoretically + [past participle]
用法筆記
Commonly modifies verbs of analysis or discussion (examine, discuss, study, approach, understand). The focus is on concepts and frameworks, not on empirical observation.