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causal link/relationship between A and B
There is a causal link between smoking and lung cancer.
吸烟与肺癌之间存在因果联系。
因果关系的
先理解核心含义，再看它在真实句子里的用法。
因果关系的
involving or constituting a cause; causing
There is a causal link between smoking and lung cancer.
吸烟与肺癌之间存在因果联系。
属于、关于或成为某事物的原因；引起的。
Of, relating to, or being a cause of something; causing.
The study found a causal link between smoking and lung cancer.
该研究发现吸烟与肺癌之间存在因果关系。
Researchers are still trying to establish a causal relationship.
研究人员仍在试图建立因果关系。
It's hard to prove a causal connection without more evidence.
没有更多证据很难证明因果关系。
There is a causal link between smoking and lung cancer.
吸烟与肺癌之间存在因果联系。
注意causal factor常用搭配介词in
Stress is a causal factor in many diseases.
压力是许多疾病的致病因素。
causal作名词时指表示原因的连词，多见于语言学语境。
In English, 'because' is a causal.
在英语中，'because'是一个表示原因的连词。
Not this
The casual relationship between smoking and lung cancer is well known.
Use this
The causal relationship between smoking and lung cancer is well known.
混淆了形近词'causal'（因果的）和'casual'（随意的），导致语义错误。
Not this
The causal of the accident was reckless driving.
Use this
The cause of the accident was reckless driving.
将形容词'causal'误用作名词，正确名词应为'cause'。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
因果关系
There is a causal relationship between smoking and lung cancer.
吸烟与肺癌之间存在因果关系。
因果联系
The study found a direct causal link between diet and health.
该研究发现了饮食与健康之间的直接因果联系。
原因因素
Stress is a major causal factor in many diseases.
压力是许多疾病的主要原因因素。
因果效应
The experiment measured the causal effect of the new drug.
实验测量了这种新药的因果效应。
因果关系
There is no proven causal connection between the two events.
这两件事之间没有证实的因果关系。
因果关系
The study found a direct causal relationship between smoking and lung cancer.
这项研究发现吸烟与肺癌之间存在直接的因果关系。
Use causal naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
因果的（causal）可拆成 cause（原因）+ al，联想‘因为所以’的关系。
通常用于学术或正式语境，表示因果关系，比较中性。
Words like casual share a similar spelling with causal but differ in pronunciation (casual /ˈkæʒuəl/ vs. causal /ˈkɒːzəl/). No common words fully rhyme with causal.
Dictionary facts from ECDICT, WIKTIONARY.