adj.落下的
A companion star is a perfect source of infalling material for a black hole. 伴星是物质下陷形成黑洞的一个极好的物质来源。
As the white dwarf spins, the columns of infalling gas rotate with it. 当白矮星自转时，被吸入的气柱也跟著一起转起来。
Intriguingly, they found that layers of infalling matter could intersect to create momentary singularities that were not covered by horizons. 非常有趣的是，他们发现密度不同的各层物质在坍塌时，彼此会有交互作用而短暂地产生不被视界遮蔽的奇异点。
The annihilation of the infalling photon acts as a measurement, transferring the information contained in the matter to the outgoing Hawking radiation. 向内坠落的光子，其毁灭的过程就是个测量的动作，会将黑洞内物质的资讯转移给向外发出的霍金辐射。
An embryo's gravity pulls in gas from the disk, but the infalling gas releases energy and must cool off if it is to settle down. 行星胚胎的重力会从气盘吸引气体，但坠落的气体会释放能量，所以当气体安定下来后，温度必定降低。
