1. Extraneous null statements are not always harmless. 无关的空语句并非总是无害的。
2. Filtering out extraneous information is one of the basic functions of consciousness. 过滤掉无用的信息时人类意识的基本功能之一。
3. In OCR, an extraneous mark extending outward from a character past the stroke edge of the character. 在光符识别（OCR）中，超过字符笔画的边缘，由字符向外延伸的额外多余的笔迹。
英英解释
adj.
1. not pertinent to the matter under consideration
2. not essential
3. not belonging to that in which it is contained; introduced from an outside source
4. coming from the outside
