Accurate targeting is extremely difficult in B mode ultrasound guided HIFU therapy.

靶区精确定位是B超引导HIFU治疗的一个难题。

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The traditional agro-technical extension is a up-to-down mode in China, which is to use advanced technique strategy to the targeting farmers.

我国传统的农业技术推广模式是农业技术自上而下传播模式，这种模式选择了针对资源丰富农户的进步农民策略推广策略。

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The attacks crystallized al Qaeda's mode of operation: targeting American civilians and using suicide bombers.

WSJ: The Death of a Terrorist