这是探测进动的关键，因为在每次遮挡期间天文学家们可以确定放射线信号的精确角度，并因此断定脉冲星的抖动时间。
That's key to detecting precession, because during each eclipse astronomers can determine the precise angle of the radio signal and therefore the pulsar's wobble over time.
从应用的角度讲，核技术主要包括射线和粒子束技术与放射性核素技术。
As viewed from applications the nuclear technology mainly includes the technology of ray and particle beams, and the technology of radioactive nuclides.
这些容器组件的闭合表面可以构造成它们基本上与从放射性材料发出的射线的局部方向完全成角度。
The closure surfaces of these container assemblies may be configured such that they run substantially entirely at an Angle to a local direction of radiation emanating from the radioactive material.
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