每个DRACO还包括一个“传递标志”，来自于天然产生的蛋白质，允许其穿过细胞膜，进入任何人类或动物细胞中。
Each DRACO also includes a "delivery tag," taken from naturally occurring proteins, that allows it to cross cell membranes and enter any human or animal cell.
如果它们的眼睛是由蛋白质构成的(包括人类在内的大多数动物都是如此)，那它们会很快被磨损。
"If their eyes were made of protein" -which is the case for humans and most other animals - "they would get worn right away," Speiser said.
关进栅栏的牛只们-吃粗饲料、谷物、高浓缩蛋白质通常由农场病死动物的尸体研磨而成，包括牛肉！
Ranched cattle eat rough fodder, grain, high-protein concentrates usually coming from the ground bodies of dead animals, including beef!
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