Recto and verso
- 书籍的右页和左页（右页是书籍右侧的正面，左页是书籍左侧的反面。这些术语可用于实体文件交流的任何领域）
Recto and verso
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abstract:
The recto and verso are respectively the "front" and "back" sides of a leaf of paper in a bound item such as a codex, book, broadsheet, or pamphlet. In languages written from left to right (such as English) the recto is the right-hand page and the verso the left-hand page (excepting some first pages).
以上来源于:
WordNet