Their beautiful smooth scaled skin is a shade of bluish black.

它们美丽又光滑的鳞片皮透着暗沉的乌青色。

" In the middle of the big, bright room " was a big bluish black shape.

“ 在大而明亮的房间中间”是一个巨大的蓝黑色形状。

Although it depends on the subspecies, the falcon's back and crown is usually  somewhere between bluish black and grey.

虽然这取决于亚种，但猎鹰的背部和冠部通常介于蓝黑色和灰色之间。