It was strange that none of these streams fell into the valley itself.

很奇怪的是，没有水流流向河谷。

The explosion can blow out the stream of matter falling from the other star, but when things settle down after a few weeks or months, the matter stream can fall back on the white dwarf, and the whole cycle repeats.

爆炸可以将从另一颗恒星落下的物质流吹散，但当几周或几个月后一切都稳定下来时，物质流就会回落到白矮星上，整个循环重复。