ruler

🇬🇧/ˈruːlə(r)/ 🇺🇸/ˈruːlər/📚 5617 104 2四级六级考研中考高考
The ruler of a country is the person who rules the country. 统治者

noun [具体名词]统治者,管理者;尺子,直尺;(计算机屏幕的)标尺;划线板,划线的人;主导行星(对黄道十二宫图的宫、房子、生活等有特别影响的行星)

A ruler is a long, flat piece of wood, metal, or plastic with straight edges marked in or inches or centimetres. Rulers are used to measure things and to draw straight lines.

没有规矩(rule), 不成方圆, 尺子(ruler)可以用来规划图形
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