Pcna
[醫][=proliferating cell nuclear antigen]增殖細胞核抗原
??? 情景例句
If you stick to the truth, you'll have nothing to fear.
如果你堅持真理，就會無所畏懼。
I asked him to come with me , but he wouldn't.
我請他和我一起來，但是他不肯。
How far is it?
有多遠？