I also provide an example class that allows a bitmap to be used as the caption background, e. g. for logos, or wood or stone effects.

我也提供一个使用一个位图作为标题背景的例子类，如作为徽标，木材或石头效果。

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G. Frege's Begriffsschrift, a Formalized Language of Pure Thought Modelled upon the Language of Arithmetic is well-known as a foundation stone in modern logic.

弗雷格的《概念文字：一种模仿算术语言构造的纯思维的形式语言》可谓现代逻辑的开山之作。

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