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    由此推断

    Grammar & Usage

    fixed expression
    neutral

    How it works

    This phrase is used to introduce a conclusion or inference drawn from previously stated facts or information. '由此' (from this/therefore) functions as an adverbial phrase, indicating the source or basis of the subsequent deduction '推断' (to infer/deduce). It typically precedes the inferred statement.

    Sample sentences

    根据现有证据，由此推断他无罪。

    Based on the existing evidence, one can infer he is innocent.

    市场反应热烈，由此推断该产品会大卖。

    The market response is enthusiastic; from this, one can deduce the product will sell well.

    她脸上带着微笑，由此推断她通过了考试。

    She had a smile on her face; from this, one can conclude she passed the exam.

    Quick facts

    structure:由 (from/by) + 此 (this) + 推断 (to deduce/infer). It connects an observation to a conclusion.
    usage_note:Often used in formal or analytical contexts where a logical conclusion is being presented based on evidence.

    Mnemonic

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    Example

    根据现有证据，由此推断他无罪。

    Based on the existing evidence, one can infer he is innocent.

    市场反应热烈，由此推断该产品会大卖。

    The market response is enthusiastic; from this, one can deduce the product will sell well.

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