peptide growth factors的用法和样例：
例句
- Viruses are the most major pathogens of shrimp, and they can induce high morbidity, mortality and growth retardation in cultured shrimp.
病毒为虾病最主要的病原之一，不仅具有高发病率及高死亡率，且会造成虾类生长迟缓。 - Such growth shall continue in the centuries ahead until we have created a fourth dimensional form that shall be ascended into, relinquishing life in the third dimension altogether.
这类生长，将会在前方数个世纪不断持续，直到我们创建了一个第四维度的身体来提升进入而放弃第三维度的所有生命为止。
