mm
UK
US
Paraphrase
分析词义
“mm”在英式英语中表示毫米（millimeters），是长度或距离的度量单位之一。然而，在照相机和摄影世界中，“mm”通常指的是相机镜头的焦距。
列举例句
词根分析
“mm”是缩写，直接来自于单词“millimeter”。
词缀分析
“mm”作为缩写，没有词缀。
发展历史和文化背景
“mm”最早起源于hanguo，其最早的用途是在工程测量和科学研究中作为长度和距离的基本度量单位。
单词变形
“mm”作为度量单位，它没有变形。
记忆辅助
可以将“mm”与“毫米”进行联想，帮助记忆。
小故事
Nick and his father were building a small wooden house. "Dad, we need a 30 mm screw here," Nick said, holding up the blueprint.（尼克和他的爸爸正在搭建一个小木屋。"爸爸，我们在这儿需要一个30毫米的螺丝，" 尼克一边举着蓝图一边说道。）
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