最下一层 meaning in Chinese

basecoat

I felt that , just as the ancient egyptians had removed a corpse ' s brain through the nostril with a slender hook before mummification , the cast and crew of this film , from the director down , had gotten into my mind and pulled out images
我感到就像古埃及人制作木乃伊时候移除尸体的大脑组织然后放入防腐剂，这部电影工作人员，从导演到最下一层工作者，侵入我的脑袋，植入影像。