翻譯2-4.3.5

Second, when electrical energy in the form of moving electrons glows through filament wires in an incandescent light bulb, about 5% of it changes into useful light and 95%flows into the environment as low-quality heat. In other words, the incandescent light bulb is really an energy-wasting heat bulb.
第二，當電能的形式，通過移動電子通過白燈光燈泡的細絲導線發光，約5 ％的轉化為有用的光和95 ％流入環境低質量的熱量。換言之，白燈光燈泡確實是一個能源浪費熱燈泡。
Third, in living systems, solar energy is converted into chemical energy(food molecules) and then into mechanical energy (for moving, thinking, and living). During each conversion, high-quality energy is degraded and flows into the environment as low-quality heat. Trace the flows and energy conversions in figure2-7 to see how this happens.
第三，在生物系統，太陽能轉化為化學能（食品分子） ，然後為機械能（移動，思想和生活） 。在每次轉換，高品質的能源是降低和流入環境低質量的熱量。看圖2- 7就會知道這怎麼發生微量的流動和能量轉換。