A good translation! My major is also biology.

Animal bodies are quiet comparable to certain machines such as train engines. In fact, an animal body itself is a machine. It is a machine with many parts. Each part has its unique function, enabled by its specific structure. All parts are dependent to (on) and coordinative (coordinate) with one another in order to accomplish the whole task of the machine.  Train engines need fuels such as coal, wood and other combustible materials.  Fuel consumption supplies the machine with power or energy. Animal bodies have to be replenished with fuels as well, so called food, offering energy to the animals. Oxygen is a must to burn the fuels in train engines and to oxidize food in animal bodies. Train engines are assembled with (from) special components; the boiler for receiving and burning the fuels, the pipes for delivering steam, the wheels for running the engine and the chimney for letting out the waste gas. Similarly, animal bodies are composed of many parts: the GI (?) tract for food ingestion and absorption, the excretion system for waste disposal, the arteries and veins for blood circulation to deliver oxygen and to maintain nutrition homeostasis, as well as the legs and wings for locomotion.

所有跟帖： 

• 谢谢您的斧正。GI tract是医学术语，消化道。 -i999- ♀ (0 bytes) () 08/09/2011 postreply 10:19:51

• 跟您探讨一下，be assembled with sth这种用法我看到有类似的例句。 -i999- ♀ (0 bytes) () 08/09/2011 postreply 10:29:39

• 回复：跟您探讨一下，be assembled with sth这种用法我看到有类似的例句。 -NewVoice- ♀ (541 bytes) () 08/09/2011 postreply 11:57:19

• make sense！谢谢您的指点。 -i999- ♀ (0 bytes) () 08/09/2011 postreply 13:46:58

• Learned the term GI tract. Thanks! -NewVoice- ♀ (0 bytes) () 08/09/2011 postreply 11:26:27

• 老相好，翻得好！找到病句一个 -非文学青年- ♀ (631 bytes) () 08/10/2011 postreply 22:54:57

• 谢谢。主语不一致了对吧。改成从句！ -i999- ♀ (0 bytes) () 08/11/2011 postreply 10:18:58

• 从句也不好。看下面的讨论了。小千翻得方式好。 -i999- ♀ (0 bytes) () 08/11/2011 postreply 10:28:34