Sample：

　　As is displayed in the first diagram,the life cycle of the silkworm can be categorized into 4 main stages.First,the life of the silkworm starts from eggs propagated by the moth,and it takes 10 days for each egg becomes a silkworm larva that feeds on mulburry leaf.Slikworm larva contiunes to grow in 4 to 6 weeks,then wraps itself with silk threadto construct a cocoon in the next 3 to 8 weeks.A moth can be produced from the cocoon in 16 days, the life cycle begins again from then on.

　　Focusing on the second diagram,it illustrates the 5 main steps of the procedure of producing silk cloth.Well generated cocoons will be selected firstly.Before the silk thread can be unwinded,concoons have to be boiled in hot water.One cocoon can produce approximately 300 to 900 metres silk thread.The unwinded thread will be dyed afterwards to be weaved into silk cloth.

　　Overall, the two diagrams reveal the stage of producing cocoons in the life cycle of the silkworm can be used to make silk cloth through 5 simple steps.