Definition
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原因
yuányīn
事物发生的理由或解释。
The reason or explanation for why something happens.
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他迟到的原因是交通堵塞。
tā chídào de yuányīn shì jiāotōng dǔsè.
The reason he was late was because of traffic congestion.
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我想知道这个决定的原因。
wǒ xiǎng zhīdào zhège juédìng de yuányīn.
I want to know the reason for this decision.
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我们需要找到问题的原因。
wǒmen xūyào zhǎodào wèntí de yuányīn.
We need to find the reason for the problem.