如何讲做这些句子的分析?

According to these simulation, the eggs of mayfly species developed faster in a moorland stream than in a forested stream (一般的比较 句). Eggs of the common mayfly, for instance, hatches (此动词不用加s，前面是eggs)about 19 days earlier in a moorland stream after having been fertilized in the spring. This, combine (此处不对，要么用动名词，要么第三人称单数) with predicted faster growth of the hatched nymphs, mean adults would emerge during November in forested stream but before the end of October in a moorland stream. 最后一句不对，两个谓语，意思上也不清楚。