Chromakey
色度键（指在胶片原有图像上添加图像）
🗣️ 情景例句
Thanks for inviting me to the dinner. I'm looking forward to it.
谢谢你邀请我一起吃晚饭，约会日期早些到就好了。
I'd like to reserve a sleeper to chicago.
我要预订去芝加哥的卧铺。
That's just what I was thinking.
我也是这么想的。