It is found that the trap effect of the sensitization centers varies from the hole trap to deep electron trap with the change of sensitization conditions.

实验发现，随增感条件的不同，增感中心发生了由空穴陷阱作用向深电子陷阱作用的转变。

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In some coastal cities, like Shanghai, the middle income trap is changing the growth trajectory of major urban centers.

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Based on the fact that many big emerging markets, especially in its big urban centers, have already hit or are near hitting the middle income trap.

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