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Not confined to clothing, silk was also used for a number of other applications, including writing, and the colour of silk worn was an important indicator of social class during the Tang Dynasty.

丝绸不仅用于衣物，而且还有许多其它用处，包括书写，以及人们穿戴丝绸的颜色在唐朝是社会阶级的重要标志。

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Nevertheless, recent evidence shows that social bonding enhances reproductive success, an important indicator of evolutionary fitness.

尽管如此，最近还是有证据表明，牢固的社会纽带有助于提高繁殖成功率，这也是进化过程中重要的健康指标。

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And an increasingly assertive Hispanic caucus, in an increasingly Democratic state, also seems sure to demand better schools and health care for the people it represents, who currently lag far behind the Anglos on any social indicator you care to name.

ECONOMIST: Lone Star rising

It is hardly the kind of social indicator one can get worthwhile data points on (after all, how big or small a shift counts as a new career?) But a common consensus estimate is that people now are doing what counts as changing career four or five times per person.

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And second, increased sales is not the best and only indicator of social media success.

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