半圆的英文：
semicircle

参考例句：
  • Semicircular arch
    半圆券
  • Half-round rasp
    半圆(木)锉
  • Cutters for woodruff keyseats
    半圆键槽铣刀
  • Convex and concave milling cutters--Part 1: The types and dimensions for concave milling cutters
    凸凹半圆铣刀第1部分:凹半圆铣刀的型式和尺寸
  • I asked my students to sit in a semicircle to listen to the story.
    我让我的学生们围成半圆坐着听故事。
  • Use cinnamon paint and a liner brush to sketch the face of the sun. Paint yellow rays between the half circles.
    用肉桂色描绘太阳的五官.在半圆见涂上黄色射线.
  • A diaphragm is soft dome that can be inserted into the vagina to cover the cervix before intercourse.
    子宫帽是一个半圆的柔软膈膜，在性交之前放入阴道，盖住宫颈部位。
  • A small, circular or crescent-shaped opening in a vaulted roof.
    半圆壁，弧形窗在高高的屋顶上的小的，圆的或新月形的开口
semicircle是什么意思：
n. 半圆；半圆形；半圆形之物
  • They are sitting in a semicircle.
    他们正围成半圆形坐着。
  • I asked my students to sit in a semicircle to listen to the story.
    我让我的学生们围成半圆坐着听故事。

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