英语语法分析

The optimum nitrogen source is urea, next is peptone or yeast extract.

氮源中尿素最好，其次为蛋白胨和酵母膏；

The optimum carbon source was glucose and peptone as the optimum nitrogen source.

葡萄糖，蛋白胨是两菌株发酵产酶较好的碳、氮源。

However, the effects are not visible adding peptone, coconut milk, aneurin and inositol.

添加蛋白胨、椰子汁、硫胺素和肌醇效果不明显。