deep-leaved
1.2 A nightjar in deep-leaved shadow called three long notes, and hushed.
2.Its creation reason contain deep history background and realistic factor, this thesis uses Principal Component Analysis method, passing to set up an index sign system which includes 6 aspects total 17, which makes use of SPSS software for reason why Peasants leaved villages from 22 provinces in whole country in the republican period, the analysis result shows that according to its important degree respectively, the main factor of problem are: The economy collapses, natural disaster, population impacted, market decline, the farmer income is low to fall and the government manage blemish factors.

