The use of push-pull probe can lower the demand of laser linewidth in optical fiber sensors, so we can use normal laser in optical fiber sensors and spread practicability of the system.

而采用推挽式探头设计结构，由于两臂等长可以降低传感器对激光器线宽的要求，采用普通的激光光源就可以满足要求，拓展了系统的实用性。

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It is applies Granger causality tests to test the causes of China technology markets growth according to technology demand pull and technology push theories.

采用格兰杰因果分析法，依据需求拉动和技术推动理论，对中国技术交易规模扩张的原因进行了实证检验。

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That push-pull of supply vs. demand will keep prices elevated as we head into the spring selling season and its looking like that shopping season will be weaker this year than last.

FORBES: Uh-Oh, Even Wal-Mart Faces The Cash Strapped Consumer