That massive object ACTS as a gravitational lens.

这种超级天体如同一个引力透镜。

A gravitational lens is formed when light is bent by a massive object.

引力透镜现象就是光被巨大质量物体弯曲的现象。

Such a society could use its own star as a gravitational lens, and even see the glow from our street.

它们的社会可以用自己的恒星作为引力透镜，甚至可以看到我们街上路灯所发出的光芒。霍金的警告是不切题的。

The astronomers found an "X-ray mass" only a tenth of the mass found using the gravitational lens method.

天文学家发现“X射线估算的质量”仅有“引力透镜”方法估算的质量的十分之一。

This article briefly introduces the basic principles of gravitational lens and NFW mass distribution model.

简要介绍了引力透镜，NFW质量分布模型的基本原理。