英语单词“penumbra”的意思是半影,读音为英 [ˌpɪnjuˈmæərə]、美 [ˌpɪnjuˈmærə]。例句如下:
1. The moon has a penumbra, which is a shadowy area. 月亮有半影,即一个阴影区域。
2. The sun has a penumbra, which is a shadowy area around it. 太阳有半影,即它周围的阴影区域。
3. The penumbra is a kind of shadow that exists in the world. 半影是存在于世界中的一种影子。
4. The penumbra is a kind of shadow that is caused by the position of the sun. 半影是由太阳的位置所引起的影子的一种。
5. The penumbra is a kind of shadow that is different from the umbra. 半影是一种不同于本影的影子。
6. The penumbra is a kind of shadow that is often seen in the sky. 半影是在天空中经常可以看到的一种影子。
7. The penumbra is a kind of shadow that is formed by the sun and the earth. 半影是由太阳和地球形成的影子的一种。
8. The penumbra is a kind of shadow that is similar to the dark area in the forest. 半影类似于森林中的暗区。
9. The penumbra is a kind of shadow that can be seen in the sky at noon. 在中午时分,半影可以在天空中看到。
10. The penumbra is a kind of shadow that belongs to the earth and it cannot be moved by mankind. 半影是属于地球的影子,人类无法移动它。
“penumbra”通常指太阳或月亮在给定时间在其周围区域所形成的暗影部分,它在月食和日食时最为明显。这些例句生动地描绘了“penumbra”这一概念,有助于读者更好地理解和掌握这个单词。