求翻译：每年五月中下旬，当冰山上的冬雪开始融化，气候转暖的时候，草蝙蝠蛾的幼虫破土而出，开始活动，在山上的腐殖质中爬行，待头向上爬至虫体直立时，寄生在虫头顶的菌孢开始生长，菌孢开始长时虫体即死，菌孢把虫体做为养料，生长迅速，虫体一般为四至五厘米，菌孢一天之内即可长至虫体的长度，这时的虫草称为“头草”，质量最好；是什么意思？

In late May each year, when the tip of the winter snows began to melt, when the climate gets warmer, the grass bat moth larvae emerged and started activities in the mountains of humus in the crawl, to climb to the first worm to be upright, parasitic fungus spores in the insect's head began to grow,

正在翻译，请等待...

Every year mid-May, when on the iceberg winter snow starts to melt, the climate extension warms, the grass bat moth's larva emerges as the times require, starts to move, crawls when the mountain humus, waits to crawl upwardly stands erect to the insect body, parasites in the insect top of the head f

Annual May in the late, dang iceberg Shang of winter snow began melting, climate go warm of when, grass bat moth of larvae said of a young bamboo shoot etc, began activities, in mountain Shang of humus in the crawling, to head climb up to insect body upright Shi, parasitic in insect head of bacteria