Ac

• The ray _AC_, parallel to the principal axis, will pass through the lens and emerge as _DE_. 伯莎M.克拉克. 科学通论.
• In the previous century Mayow had obtained nitric oxide by treating iron with nitric ac id. 李贝. 西洋科学史.
• He approached the solution gradually, ever taking into ac count more terms of the perturbations. 李贝. 西洋科学史.
• The point where _AC_ and _AO_ meet after refraction will be the position of the top of the arrow. 伯莎M.克拉克. 科学通论.
• For this study, Natural History, ac cording to Bacon, supplies the facts. 李贝. 西洋科学史.

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