例句與造句

1. What fractions of npp are invested in allelochemic substances in different communities ?
   在不同的群落的NPP中究竟有多大部分投入他感化學(xué)物質(zhì)？
2. What fractions of npp are invested in allelochemic substances in different communities
   在不同的群落的npp中究竟有多大部分投入他感化學(xué)物質(zhì)？
3. It's difficult to find allelochemic in a sentence. 用allelochemic造句挺難的