The beer will spume if you pour it too fast.

如果你把啤酒倒得太快，它会起泡的。

It looked exanimate enough, with its idle wheel looming above the black stream dashed with yellow-white spume, and its cluster of sheds sagging under their white load.

它看起来很活泼， 空转的轮子若隐若现地出现在黑色的溪流上方， 溪流上泛着黄白色的泡沫， 一簇簇棚屋在白色的负载下下垂。