However, with the principal and non-principal concept of the classification of these two opposites have to describe the situation of lack of labor can not be denied. Although most of the time non-principal tendencies and bad work link, but still can not rule out the condition of the exception, in this case the concept of precariousness of - this proposed has a very important meaning - that is, beyond the principal - Non-chief of dichotomous, is put forward.
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