For example, the scum on the river Ankh, that great wide slow waterway that served the double city as reservoir, sewer and frequent morgue, had turned a particularly iridescent green.

• 例如，安科河，那宽阔缓慢的运河，被用作双城的蓄水库、污水管、经常还要客串一下陈尸所，它的泡沫变成发出特别虹彩的绿色。