词族 · protractor
词形变化
中文词源
protractor 量角器，分度规
来自protract,拖延，延长。
英语词源
- protractor (n.)
- 1610s, "one who lengthens (an action)," from Medieval Latin protractor, agent noun from Latin protrahere "to draw forward" (see protraction); sense of "instrument for drawing angles" first recorded 1650s.
权威例句
- 1. Use your protractor to construct an equilateral triangle.
- 用量角器作一个等边三角形.
- 2. This compass serves as a protractor.
- 这个罗盘可用作分度规.
- 3. To draw to scale by means of a scale and protractor; plot.
- 测绘用圆规和量角器划线和角; 标绘.
- 4. Screen angle indicator: A protractor with many co - centre circles.
- 网角指示器: 是一个带有很多同心圆的量角器.
- 5. I can't find my protractor.
- 我找不到我的半圆仪了.