Definition
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理论
lilun
理论是对某种现象或问题的系统解释和推理。
Theory is a systematic explanation and reasoning of a certain phenomenon or problem.
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他的理论解释了为什么会有季节变化。
tā de lǐlùn jiěshìle wèishéme huì yǒu jìjié biànhuà.
His theory explains why there are seasonal changes.
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科学的理论需要经过实验验证。
kēxué de lǐlùn xūyào jīngguò shíyàn yànzhèng.
Scientific theories need to be validated through experiments.
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这个理论在学界引起了广泛的讨论。
zhège lǐlùn zài xuéjiè yǐnqǐle guǎngfàn de tǎolùn.
This theory has sparked widespread discussion in the academic community.