stream

来自担忧客户的电话一直源源不断。

There has been a steady ___stream of phone calls from worried customers.

我生病期间，访客不断。

I had a constant ___stream of visitors while I was ill.

在老城区，游客可以观看源源不断的过路人。

In the old city, visitors can watch an endless ___stream of passers-by.