The noise from the LRAD is directed like a ray of light and travels only into the ears of that person, but it is not deadly.
远程定向声波发射器（Long Range Acoustic Device）发出的噪音像光线一样，进入指定人的耳朵中，然而它并不致命。
The physicists directed the X-ray flashesinto a vacuum chamber filled with a few atoms of an inert gas.
物理学家将X射线引入真空密闭腔中，填充少量的惰性气体。
Objective To study the successful puncture rate and complications of lumbar sympathetic ganglion puncture directed by X-ray fluoroscopy.
目的研究X线平片测量法和X线透视法在腰交感神经节穿刺中的到位成功率及其并发症。
Objective To study the successful puncture rate and complications of lumbar sympathetic ganglion puncture directed by X-ray fluoroscopy.
目的研究X线平片测量法和X线透视法在腰交感神经节穿刺中的到位成功率及其并发症。
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