Tell the biographies of the Robert Burns ,using the key words and expressions given below To earn one's libing ,to work in the fields,in spite of ,to be jolly by nature ,to begin to write poems(at the age of 16) ,his first book of poems,to publish,to move to Edinburgh,to be a success as a poet ,to gain popularity,the French Revolution (1789),to break out,to greet,poor health,particulary hard,to pay one's debts,to die in poverty,to be in great demand