• 正象透镜可以放大那样,双凹透镜可以缩小

    Just as a double convex lens enlarges so a double concave lens reduces.

    youdao

  • 正象透镜可以放大那样,双透镜可以缩小

    Just AS a double convex lens enlarges, so a double concave lens reduces.

    youdao

  • 显然我们希望透镜一个放大正象

    Evidently, it would be desirable for the lens to form a magnified, erect image.

    youdao

  • 显然我们希望透镜一个放大正象

    Evidently, it would be desirable for the lens to form a magnified, erect image.

    youdao

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