Second, and more importantly, it causes a thin and very active layer of algae, plankton, bacteria, and other forms of life to develop on the surface of the sandbed.

其次三级AAA片免费观看免费观看视频，最重要的是，它形成了一個(gè)很薄并且很活躍的層天天日天天射天天舔，這個(gè)層是由藻類欧洲美女精品一区二区、浮游生物、細(xì)菌以及其他能夠在沙子表面繁衍的生命形式久久久精品首页。

Second, and more importantly, it causes a thin and very active layer of algae, plankton, bacteria, and other forms of life to develop on the surface of the sandbed.

其次wwwA片网站国产，更重要的是，它可形成一個(gè)很薄并且很活躍的生物層十八岁以下禁止看的黄，這個(gè)層是由藻類2012在线中文字幕、浮游生物、細(xì)菌以及其他能夠在沙子表面繁衍的生命形式組成又硬又爽又粗又长的视频。

Wet soil or rock surfaces are always coated with a thin layer of algae, which is very slippery.

泥面或石面常長有濕滑的苔蘚或藻類18禁又污又黄又爽的网站，踏上這些表面前宜先輕力試探。

A black layer rich in organic matter, is a complex combination of blue-green algae cells, white layer algae are bonded by being composed of carbonate particles.

黑色層富含有機(jī)質(zhì)色欲色偷偷综合网，是藍(lán)綠藻細(xì)胞的復(fù)雜組合综合色色色，白色層則由被藻類所粘結(jié)的碳酸鹽微粒組成。

algae layer：(高層涇原苔層下的)藻類層

"藻菌類","algae fungi;Phycomycetes" | "(高層涇原苔層下的)藻類層","algae layer" | "(地衣中的)藻層","algae layer;aglae zone"

algae layer;aglae zone：(地衣中的)藻層

"(高層涇原苔層下的)藻類層","algae layer" | "(地衣中的)藻層","algae layer;aglae zone" | "滅藻劑;除藻劑","algicide"