emergent ray point 显出射线点
X-ray point-source X射线点源
Point ray 该连线称为图象点连线
two-point ray-tracing 两点射线追踪
two point ray tracing 两点射线追踪
shot point ray parameter 炮点射线参数
focal point of ray 射线的焦点
X-ray soldering point tester X光焊点检查仪
Central point of X-ray bundle X射线束中心线
The search for gamma ray point sources is a popular topic in the study of cosmic rays.
点源的寻找是宇宙线研究中的一个热门课题。
Part of the trouble, Mr Settersten and Ms Ray point out, is that in the absence of reliable public schools, parents must play a big role in the academic careers of their children.
谢特·斯丹先生和雷先生指出，部分困难是父母们在缺乏可靠的公立学校时，必须在他们孩子的学术生涯里发挥出重大作用。
And, we are going to shoot a ray from the origin towards this point, and we want to know what portion of the ray is in our solid.
然后从原点引一条射线到这个点上，需要知道射线的那部分在我们的立体中。
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