darkening rate

• 变暗速率

darkening rate的用法和样例：

例句

1. The increased darkening of the sky toward the right indicates the darkened atmosphere created by the passing shadow cone of the total solar eclipse.
   右侧的天空逐渐变暗这就表明日全食的影锥通过了地球的大气层，使得那里变暗。
2. It may serve, let us hope, to symbolize some sweet moral blossom, that may be found along the track, or relieve the darkening close of a tale of human frailty and sorrow.
   它可作为，让我们希望，象征甜蜜的一些道德开花，这可能是沿著轨道发现，或减轻人类的脆弱和悲伤的故事变暗关闭。