Fires Long Ago很久以前的火We don&#39t know how the first fire was made.我们不知道第一束火是怎样来的。Early fires on the earth were certainly caused by nature,not by man.但地球上早期的火是由大自然产生的，不是人发明的。Some were caused by lightning in a storm,有些火是由雷电造成，others,perhaps by one hot material which came out of a volcano.有的也许是由火山喷发出的热物