3-5 上課翻譯內容

Energy flow pyramids explain why the earth can support more people if they eat at lower trophic levels by consuming grains , vegetable , and fruits directly rather than passing such crop through another trophic levels and eating grain eaters or herbivores such as cattle . About two-thirds of the world’s people survive primarily by eating wheat rice , and corn at the first trophic level , mostly because they cannot afford meat . the large loss in chemical energy between successive trophic levels also explains why food chains and webs rarely have more than four or five trophic levels . In most cases, too little chemical energy is left after four or five transfers to support organisms feeding at these high trophic levels .

能量流金字塔解釋為什麼地球上可以支持更多的人，如果他們直接攝取比較低營養層的穀物，蔬菜，水果而不是間接攝取另一個營養層的食用者或草食動物例如牛。大約有三分之二的世界人口主要生存是由吃小麥大米，玉米在第一營養層，主要是因為他們負擔不起肉。化學能大量的的損失在連續營養層之間也解釋了為什麼食物鏈和網很少有超過四個或五個營養層。在大多數情況下， 第四層第五層沒有足夠的能量轉移以支持生物餵養這些高營養層。