Chromakey
色度键（指在胶片原有图像上添加图像）
🗣️ 情景例句
What has kept you so busy?
什么使你这么忙？
It's up to you.
一切由你决定。
The moment he reached the country, he started his search.
他一到达冈比亚，就开始探寻工作。