网络舆论具有主体众多、议题广泛而随意、时效性强、复杂多变等特点。
Network public opinion has the characteristic of broad participants, wide and random range of issues, time-intensive, complex and so on.
随着“脑白金”的成功，软文广告也因其商业味道淡，可信程度高，时效性强；
Along with "Melatonin" The success of soft-text advertising business has its light taste, a high degree of credibility, timeliness strong;
在内容选择与结构安排上，这四本书可谓风格统一、资料翔实、内容全面、时效性强。
From the levels of content selection and structure arrangement, these four books are all having unified style, lots of materials, comprehensive contents and stronger timeliness.
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