复数:penumbrae 复数:penumbras
1.【物】半影,黑影周围的半阴影
2.(绘画中)画面浓淡相交处
3.【天】太阳黑子周围的半暗部;(星面部的)阴影
1.an area covered by the outer part of a shadow, so that it is not completely dark