It was finded by using flow cytometry that the apoptosis rate of porcine ear skin fibroblasts cultured under a variety of cell cycle-arresting treatments was quite low.
3
在这个阶段可以给它真正的骨头,咬胶、 猪耳或者其他对幼犬安全的东西给它咬。
This is the time to provide real bones, rawhides, pig ears and other safe things for the puppy to chew on.