原因
A person or thing that gives rise to an action, phenomenon, or condition; the logic or motive behind a fact.
Examples
3 of 5由于天气原因，我们的航班延误了。
Due to weather reasons, our flight was delayed.
专家们正在调查事故的真正原因。
Experts are investigating the true cause of the accident.
这是由于多种社会原因造成的。
This is caused by multiple social reasons.
Word Family
Memory Tip
原 means 'source/original' and 因 means 'cause'. The source cause.
Quick Quiz
全球变暖的___有很多，其中包括二氧化碳排放。
Correct!
The correct answer is: 原因
Examples
由于天气原因，我们的航班延误了。
everydayDue to weather reasons, our flight was delayed.
专家们正在调查事故的真正原因。
academicExperts are investigating the true cause of the accident.
这是由于多种社会原因造成的。
formalThis is caused by multiple social reasons.
你能告诉我你辞职的原因吗？
businessCan you tell me the reason for your resignation?
没啥特别原因，就是不想去。
informalNo special reason, I just don't want to go.
Word Family
Common Collocations
Common Phrases
因果关系
causal relationship
无缘无故
for no reason at all
事出有因
there is a reason for what happened
Often Confused With
理由 is often a 'justification' or 'excuse', whereas 原因 is a more objective 'cause'.
Usage Notes
A key word for 'Cause and Effect' essays in IELTS.
Common Mistakes
Avoid saying '原因是因为...' (The reason is because...), instead use '原因之一是...' or '因为...'.
Memory Tip
原 means 'source/original' and 因 means 'cause'. The source cause.
Word Origin
Originates from 'source' and 'cause'.
Grammar Patterns
Quick Quiz
全球变暖的___有很多，其中包括二氧化碳排放。
Correct!
The correct answer is: 原因
Related Grammar Rules
Related Vocabulary
More academic words
随后
B2Soon after; following that. Used to describe an event occurring immediately after another.
迄今
B2Up to this time; until now. It is often used to emphasize a record, a state of affairs, or the extent of something up to the present moment.
分析
B1To examine something in detail in order to understand it better or explain it. It involves breaking a complex topic into smaller parts to gain a better perspective.
影响
B1To have an effect on the character, development, or behavior of someone or something, or the effect itself.
趋势
B1A general direction in which something is developing or changing.
解决
B1To find an answer to, explanation for, or means of effectively dealing with a problem, difficulty, or dispute.
证据
B1The available body of facts or information indicating whether a belief or proposition is true or valid.
结论
B1A judgment or decision reached by reasoning; the end or finish of an event or process.
资源
B1A stock or supply of money, materials, staff, and other assets that can be drawn on by a person or organization in order to function effectively.
提高
B1To raise the level, quality, or standard of something; to improve or increase.
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