上海高一生物第一册书:请问 potato dextrose agar的具体成分是什么？

请问 potato dextrose agar的具体成分是什么？ a big potato I want to be a small potato “you are a big potato ” means ??????? thank you 请帮忙翻译Step on no pets,Sit on a potato pan, Otis. 沙发上的马铃薯（a couch potato ) 这个说法怎么来的？ I'd like a bowl of noodles with beef and potato the teacher thought little of the matter because he considered it a small potato 连词成句: , Lucy,like,would,a,and,some,bamburger,potato,chips THE teacher thought little of the matter beacause be considered it a small potato的中文意思是什么？