Economical circumstances, propagationconditions and so on in China and the United States in later of 20'th century have important effect on the dominant ideas development.
中美20世纪后期的经济环境、传播条件等因素对中美广告设计主导观念演变具有重要影响。
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This study reveals not only the technique of propagation of P. ensiformis with spores for horticulture but also the proper conditions for molecular biology, genetics and systematics study.