unknown growth factor meaning in English

未知生长因素

Also contains microorganisms which have water - cleansing properties , being able to break up and dissolve remaining suspended feed particles as well as providing the necessary nourishment for the shrimp larvae . this can make up for difficulties resulting from lack of unknown growth factors in artificial feed
内含使水质净化的微生物，可使多馀之残饵分解，净化水源及供幼虾摄食，以补足人工饲料不足的未知生长因子。
Artemia is based on the nutrient requirements of larval fish and crustacea that was researched by growers and specialists . in order to provide the necessary nutritional requirements our ingredients include fresh fish , hog liver and whole egg liquified by enzymes under 50 , which can provide nucleic acid and unknown growth factors , supplementing the insufficient nutrition in natural artemia
维仁公司生产的维仁牌人工卤虫，鱼苗丹是用生鲜鱼虾猪肝以酵素于下分解，取滤液与生蛋维他命微量矿物质于以下聚合而成，其原料保有天然的核酸酵素及许多未知天然生长激素，其营养理论上应比天然卤虫