frog spit

frog-spit的词性：
n.（名词）

1. A foamlike aggregation of small aquatic plants, such as green algae, on the surface of a pond.Also called frog spittle
蛙沫藻：一种小的水生植物的泡沫状集合体，例如池塘表面的绿水藻也作 frog spittle

2. See cuckoo spit
参见 cuckoo spit