目的探讨组织谐频成像（THI）与常规基频成像（FI）的对比观察，研究THI改善声像图质量，增强图像的显现力。

Objective To study the method of how to improve the quality of sonograms and increase sonograms reveal rate by comparative observation between tissue harmonic imaging(THI)and fundamental imaging (FI).

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在其他地方，雇主们相比之下显现出较少的创造力。

Elsewhere employers have been less inventive.

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我们的大问题逐渐显现——美国教育、竞争力和基础设施的衰落，还有对石油极度依赖和气候变化。

Our big problems are unfolding incrementally - the decline in U.S. education, competitiveness and infrastructure, as well as oil addiction and climate change.

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