nigra

例句：

1. 1. The night sky was filled with stars of all colors, but the nigra seemed to dominate.
   夜空中星星的颜色应有尽有，但深黑色似乎占据了主导。
2. 2. The nigra clouds hung low over the city, casting a shadow over everything below.
   深黑色的云层低垂在城市上方，给下方的一切投下了阴影。
3. 3. The nigra trees were the only greenery in this desolate area.
   这片荒凉的地方只有深黑色的树木是绿色的。