Chromakey
色度键（指在胶片原有图像上添加图像）
🗣️ 情景例句
What do you do when you are not working?
工作之余你有什么消遣活动？
Too much spoils, too little is nothing.
过多反坏事，太少不济时。
Does she like ice-cream?
她喜欢吃冰淇淋吗？