There may be positive regulation mechanism between growth factor and its corresponding receptors.

生长因子与其相幢受体之间，可能存在正反馈调节机制。

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Two positive regulation regions and two negative regulation regions were found within NOS1 promoter. TSA may up-regulate the transcription activities of NOS1 promoters of different length.

在NOS1基因启动子区鉴定了两个正调控区域和两个负调控区域，同时TS A可上调不同长度启动子的转录活性。

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The whole competition ability of a region is usually supposed to be positive related with perfection of the market regulation.

一个地区的产业整体竞争优势通常是与其市场规制条件的完善程度正相关的。

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Asked whether he thought some bankers would use Davos only as a lobbying tool against the kind of banking regulation favored by Sarkozy, Schwab remained positive.

CNN: 'Mr Davos' optimistic ahead of 40th annual meeting

Of course, it does not imply, when transaction costs are positive, that government actions (such as government operation, regulation or taxation, including subsidies) could not produce a better result than relying on negotiations between individuals in the market.

FORBES: Telecommunications And The Public Use Principle

Meanwhile, Office of Rail Regulation chairman Anna Walker said that although it was "positive" to see "good levels of passenger satisfaction", it was clear that "passengers continue to voice familiar concerns".

BBC: Rail passengers 'more satisfied'