在经季节性调整制度背景下，据汽车数据公司调查显示，轻型汽车销售量已于九月份跌至1992年以来的最低点。

On a seasonally adjusted basis, light-vehicle sales in September were the lowest since 1992, according to Autodata Corp, a research firm.

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但是这些理论都是有一定制度背景的。

But these theories have certain system background.

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特殊的经济、制度、历史背景造就我国上市公司的委托代理问题有别于西方发达国家。

The entrusting-deputizing problem in the China's listed companies is different from that in western countries just because of special economy, system and history background.

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