Lacticcasein
乳酪素
🗣️ 情景例句
Yup. Forty-three years.
是的。四十三年。
It's earier to run down the hill than go up.
下山容易上山难。
Because the equipment for adding sound to films had not yet been developed.
因为给电影配音的设备还没有研制出来。