From three aspects analysis of employment, rights and adscription security, new generation of landless migrant workers even deep in marginal state.

从就业保障、权益保障与归属保障三方面剖析，可发现新生代无地农民工被置于边缘化的状态之中。

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The starting of tip-burn mainly on leaf's marginal and stem. Spot and rot are it's main symptoms, only 50% material show water strain. There is deep relation between symptoms and varieties.

干烧心的始发病部位主要在叶缘和叶柄，症状主要表现为斑点和枯边，水渍只有50%的材料表现，心叶的症状表现与品种有密切关系。

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