I am so sorry that I cannot type Chinese, and it's so inconvenient for me too.
I am asking a question for a friend in China, who is interested in a 从山药提取生物荷尔蒙技术. She knows 美国有这方面的研究。
Is there anyone who has the information? or even some vague information? Please give me some directions how to dig into the subject. I don't even know the English name for 山药.
Your help is greatly appreciated!
Girlscout