9分雅思图表小作文范文全集之流程图 蝉与蝉衣

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9分雅思范文之双流程图：蝉与蝉衣It is a process diagram, featuring the life cycle of the

silkworm and the production of silk cloth.

范文集结：全部15篇9分雅思流程图范文汇总放送

范文

The graphic illustrates the life process of the silkworm and the phases in

the manufacture of silk material.

Overall, the life cycle is a natural process and contains four cyclical

phases, beginning with the laying of eggs and ending with the birth of a new

moth from a cocoon. The production of silk is, in contrast to the previous

stage, a man-made linear process comprising of 6 main stages.

To begin with, eggs are produced by the moth and it takes 10 days for the

eggs to hatch into silkworm larvae that feed on mulberry leaves. This stage

takes between 4 and 6 weeks before the worms construct a cocoon from silk

thread, taking approximately one week. They stay there for around a fortnight,

subsequently emerging as moths and the process can begin again.

The first stage in the manufacture of silk is the selection of cocoons and

these are then boiled. Once boiled, the silk thread is unwound to a length of

between 300 and 900 meters. Finally, the silk can be twisted and weaved into

cloth before being dyed.

(180 words)