谢谢愚教授仔细的批改！

 

先看一遍，文教授/专家好象说过会给你看的。

A locomotive has to be added fuel, such as coal, firewood, or other flammable substance, consuming which may provide motion or energy for the machine.

可能是我少见多怪，定语从句的连词前只用介词而不用分词？
为什么不先原文那样分为两句？

你说的很对。

这句话我在想如果只用一句话该怎样表达呢？很困惑。希望文青大师能帮助解决。

The body of an animal also needs fuel supplementation being called food, which may  provide energy to the animal.

may is not needed?

accepted

In order to ignite the flammable substance and  oxidize the food in the animal body, oxygen is essential. 

ignite --> burn or combust.

accepted

The locomotive is composed of special parts:  the hearth to accept and ignite the flammable substance, the pipe to transport steam, the wheel to make the locomotive move on, and the chimney to exhaust gas. 

hearth ?

查的字典：炉膛。newton也用了这个词。

gas --> waste gas

accepted

While  the animal body is also composed of different parts: gastrointestinal tract to ingest and absorb food, the emunctory organ to evacuate waste, the arteries and veins to transport oxygen and store nutriment, and the legs and wings to move on.

the legs and wings to move on 没有翻出原意：使动物行进的腿或翅膀

accepted。主要是不会接着怎么用不定式怎么表达出来。and the legs and wings to move on the body of animal？