The wide-set green eyes, though, hid beneath their overcasting of spice-imbued blue.
然而，宽阔的绿色眼睛隐藏在充满香料的蓝色阴影之下。
英语百科
Overcasting
Overcasting is the process of broadcasting content that is meant to be played over and in sync with another piece of content. For example, a forensics expert might create commentary for an episode of CSI and share that commentary independent of the original video. The file containing the commentary, mixing information and synchronization data is called an Overcast.