The free electron laser with a linearly polarized wiggler and axial guide field hag been studied.

本文研究的自由电子激光器具有线性摆动器及轴向引导磁场。

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However, the poor service attitude of tour guides in some small and medium-sized agencies have badly affected the good image of tour guide field.

但是，目前我国一些中小型企业的导游人员，她们不良的服务态度严重影响了整个行业的形象。

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The result shows that through integrated optimizing, it can confirm reasonable fracture parameters, guide field fracture design with desirable results.

结果表明，通过综合优化，确定合理的裂缝参数，指导现场压裂设计，效果较好。

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Teachers could use the Streak many more ways, including as an interactive guide during field trips and instruction tool inside the classroom, says Garry.

FORBES: Dell Pitching 'Streak' Tablet To Schools, Government

It remains a field guide organized by symptoms, clustered in categories that can expand without limit.

WSJ: DSM-5: A Manual Run Amok

The book is called : 'The Field Guide to the British Bumblebee'.

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