penumbra
「penumbra」的意思
n. 半影
n.[天](日蚀、月蚀或太阳黑子的)半影
「penumbra」的用法
penumbra半影，微弱的光线 - 在天文学中，penumbra指的是月球在地球阴影中所形成的半影区域。
「penumbra」的例句
The penumbra of the moon can be seen during a partial solar eclipse.
在部分日食时，可以看到月亮的半影。
The penumbra of the shadow is faint and hard to see.
阴影的半影很淡，很难看到。
The penumbra of the light is a soft, diffused glow.
光的半影是一种柔和、扩散的光辉。
The penumbra of the tree's shadow is cast on the ground.
树的阴影的半影投射在地上。
The penumbra of the light from the lamp is visible in the room.
房间里的灯的半影是可见的。
The penumbra of the sun's rays can be seen through clouds.
太阳的光线透过云层可以看到其半影。
The penumbra of the light from the street lamp is bright but not harsh.
街道灯的光的半影明亮但不刺眼。
The penumbra of the moon during a lunar eclipse can be observed with binoculars.
用双筒望远镜可以观察到月食时月亮的半影。
The penumbra of the light from a flashlight can be seen in dark rooms.
在黑暗房间里可以看到手电筒光的半影。
The penumbra of the sun's rays during a solar eclipse can be observed with special glasses.
在日食时，可以用特殊眼镜观察到太阳光线的半影。