Chromakey
色度键（指在胶片原有图像上添加图像）
🗣️ 情景例句
Why are you back so early?
你们怎么这么早回来？
You get what you pay for.
便宜没好货。
for there was a danger that if she traveled too quickly, this rudder would be torn away as well.
因为船不能开得太快，否则就有危险，应急舵也会被刮走。