内部自分泌内源性生长因子的羧基端加上特定序列使之不再分泌于细胞外而依然保持生物活性
The carboxyl terminus of endogenous growth factors secreted internally are added with specific sequences to prevent them from being secreted outside the cell and thus maintain their biological activity
以上为机器翻译结果，长、整句建议使用 人工翻译 。