adjacent side

基本解释

Ratio of the adjacent side to the hypotenuse .
直角三角形的一个角的邻边与斜边之比。
The plot is situated 500m south of Jiaxing entrance & exit of the expressway, adjacent to west side of Jiahai Road and at the south side of China Small Home Appliance City.
该地块位于高速公路嘉兴出入口南侧500米，紧靠嘉海公路西旁边，北靠中国小家电城。
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A fuel stream is injected through at least one fuel injection side adjacent to the oxidant injection side in the combustion zone.
燃料物流通过至少一个燃烧区内与氧化剂喷入侧相邻的燃料喷入侧喷入。

It's not something you're going to go back and remember it's an opposite side, it's an adjacent side.
不应该再去翻以前的课本,还去回忆哪个是对边,哪个是邻边
耶鲁公开课 - 基础物理课程节选

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