not available using current breeding technology整体是一个形容词短语作定语修饰more cost-effective plants and animals。其中using current breeding technology现在分词短语修饰available,即通过当前的繁殖方式(无法得到的)。
Businesspeople, scientists, and farmers hope that transgenic techniques will help cultivate more cost-effective plants and animals not available using current breeding technology.
这段话中,not available是形容词做后置定语修饰more cost-effective plants and animals吗?using current breeding technology是做状语吗?修饰help cultivate?