n.半圆，半圆弧线，半圆形

原形：semicircle复数：semicircles

The moon was a semicircle in the night sky, casting a silvery glow upon the land.
月亮在夜空中形成一个半圆形，给大地洒下银色的光芒。
The architect designed an amphitheater with a semicircular seating arrangement for optimal viewing.
建筑师设计了一个半圆形座位的露天剧场，以提供最佳的观看体验。
The children arranged themselves in a semicircle around the teacher during story time.
在故事时间，孩子们围绕着老师排成了半个圆圈。
The bridge's arch formed a perfect semicircle over the river, reflecting elegantly in the water.
桥的拱门在河上形成了一个完美的半圆，优雅地倒映在水中。
The gymnast executed a flawless pirouette, finishing with her body in a semicircle position.
体操运动员完美地完成了旋转动作，最后身体呈现出半圆形姿态。
The hem of her dress was adorned with a semicircle of intricate lace.
她的裙摆上装饰着一圈精致的蕾丝半圆。
The spectators at the concert created a semicircle around the stage, eager to see the performance.
音乐会的观众在舞台上形成了一个半圆形，热切期待演出。
The sun began to set, casting long shadows as it dipped below the horizon, leaving only a semicircle of light.
太阳开始落山，当它下沉到地平线下时投下了长长的影子，只留下半个圆的光亮。
The architecturally stunning building featured a grand entrance framed by a semicircular colonnade.
这座建筑风格独特的建筑物有一个由半圆形柱廊环绕的宏伟入口。
The artist painted a semicircle of vibrant colors on the canvas, symbolizing unity and harmony.
艺术家在画布上画了一个充满活力的半圆，象征着团结与和谐。