定向运动的六钩蚴有感染能力。

Those with oriented motion is of infectious oncosphere.

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目的：研究立体定向放射治疗肺癌中呼吸运动频率与图像扫描时间对靶体积定位成像结果的影响。

Objective: to study the effects of respiratory movement frequency and scanning time on the image results in the treatment of lung cancer by stereotactic radiotherapy.

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研究分子马达的物质结构基础，有助于理解其定向运动机制。

Studying the structure of motor enable us to understand its mechanism of directed movement.

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