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    研究表明，长期睡眠不足对健康不利。

    Grammar & Usage

    sentence
    neutral, formal (reporting/scientific context)

    How it works

    This is a declarative sentence reporting a finding. It follows the structure: 'Subject (研究) + Verb (表明) + Object Clause (长期睡眠不足对健康不利)'. The object clause itself is structured as 'Subject (长期睡眠不足) + Prepositional Phrase (对健康) + Adjective (不利)'. '表明' means 'to indicate' or 'to show'. '对...不利' means 'is detrimental to...' or 'is unfavorable to...'.

    Sample sentences

    研究表明，规律运动有助于预防多种疾病。

    Research indicates that regular exercise helps prevent various diseases.

    最新调查表明，年轻人越来越关注环保问题。

    The latest survey shows that young people are increasingly concerned about environmental issues.

    过度使用电子产品对视力不利。

    Excessive use of electronic products is detrimental to eyesight.

    Quick facts

    structure_of_reporting:'X 表明 Y' is a very common structure for reporting findings or conclusions from studies, surveys, or evidence. '对...不利' (unfavorable/detrimental to...) is a fixed phrase often used in discussions about impact on health, environment, etc.

    Mnemonic

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    Example

    研究表明，规律运动有助于预防多种疾病。

    Research indicates that regular exercise helps prevent various diseases.

    最新调查表明，年轻人越来越关注环保问题。

    The latest survey shows that young people are increasingly concerned about environmental issues.

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