The flow stopped before the barriers were built.

在障碍物建成之前，熔岩就停止了流动。

If water flow stops because a pipe carrying it breaks, or the pumps that push it fail, the uranium heats up very quickly and melts.

如果承载水流的管道破裂，或者水泵失灵，铀就会迅速升温并溶解。

" Busybodies. Intruders. Muggles and filth." Ogden pointed his wand at his own nose, which was still issuing large amounts of what looked like yellow pus, and the flow stopped at once.

“爱管闲事的人。闯私宅的强盗。麻瓜和垃圾。”奥格登的鼻子仍在大量流着黄脓状的东西，他用魔杖指了自己一下，它们立刻就止住了。