Noun:

1. the excrement of sea birds; used as fertilizer

guarn.瓜尔豆abbr.保证(=guarantee)guaninen.[化]鸟嘌呤Guanorn.瓜诺guanoxan胍生guanoxane胍生guanosinen.[生化]鸟苷；鸟嘌呤核苷( 一种由鸟嘌呤和核糖组成的核糖苷)guanoside鸟核糖苷guanosint[机] 鸟嘌呤核guanozola8-氮杂鸟嘌呤guanoclor胍氯酚guanochlor[化] 胍氯酚guanoxyfen胍诺西芬

1. The cave floor is covered in guano.
   洞穴地底覆盖了满满的鸟粪。
2. The canyon walls are lined with giant nests and guano.
   峡谷壁上到处是巨大的鸟身人巢穴和鸟粪。
3. Guano means droppings from seabirds which are used as a sort of fertilizer.
   鸟粪层就是海鸟的粪便，可以用作肥料。
4. Like most treasure, guano demands a high price for its extraction.
   一如大部分珍贵资源，开采鸟粪层代价很高。