The major reason for cross infection was interplanting in mulberry fields.
桑园间作是造成病害交互感染的重要原因。
The world would be quickly seas change into mulberry fields. beach area is very dangerous, earthquake in Japan is the best example.
世界将很快沧海变桑田，海滨地域很危险，日本的地震就是最好的例子。
The land of mulberry fields, tea plantations, orchards, nurseries of young plants, forest land, reed land, natural and man-made grassland and other lan are not included in cultivated land.
但不包括属于专业性桑园、茶园、果园、果木苗圃、林地、芦苇地、天然或人工草地面积。
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