half-shadow的用法和樣例：
例句
- The limits of the Moon's penumbral shadow define the region of visibility of the partial eclipse.
半影區的界限詳細定義了日偏食的可視區域。 - The combination dramatizes the reddened moonlight while clearly showing the variation of brightness and color in Earth's not-so-dark shadow across the lunar surface.
這張生動(dòng)的合成圖清楚的展示了當地球半影掃過(guò)月球表面時(shí)月亮輝度和顏色的變化。
