52頁上課的翻譯

THE more trophic levels there are in a food chain or web
the greater is the cumulative loss of usable chemi-cal energy as it flows through the trophic levels.
the pyramid of energy flow in figure 3-16 illustrates this energy loss for a simple food chain ,
assuming a 90% energy loss with transfer


這段主要是在說 當能量經過越多的階層之 能量就會損失的越多

而圖 3.16 便是在顯示這個意思