Chromakey
色度键（指在胶片原有图像上添加图像）
🗣️ 情景例句
Do you think the end is all right?
你看结尾还行吗？
My reservation number is 2991.
我的预订号码是2991。
She herself read them to me by spelling into my hand what was written in the book.
她亲自通过在我手上拼写书中的内容，把课本对我读出来。