The standard environment sampling method or the system sampling method was adopted to detect the water-snail.
钉螺调查采用环境抽样或系统抽样。
参考来源 - 血吸虫病流行因素的多水平模型研究Watched foraging of Black Stork and investigated samples bio-diversity of foraging area. The results showed the bird main food is fish, then the corbicula aurea and snail.
通过对黑鹳觅食的直接观察和觅食地生物多样性的样方调查,确定黑鹳是动物食性鸟类,主要以鱼类为食,其次是黄蚬和少量的螺类软体动物等。
参考来源 - 纳帕海黑鹳越冬生态观察The second feature is that it is the first time to analyse the snail information of the Changsha segment of Xiangjiang river with the data-driven and spatial analysis methods.
其二是首次应用格网图的数据驱动方法和空间分析相结合对湘江流域长沙段的钉螺螺情信息进行了分析。
参考来源 - 空间数据挖掘与GIS技术在钉螺螺情信息中的分析与研究·2,447,543篇论文数据，部分数据来源于NoteExpress
N-COUNT A snail is a small animal with a long, soft body, no legs, and a spiral-shaped shell. Snails move very slowly. 蜗牛
PHRASE If you say that someone does something at a snail's pace, you are emphasizing that they are doing it very slowly, usually when you think it would be better if they did it much more quickly. 慢吞吞地 [强调]
The train was moving now at a snail's pace.
火车现在正缓慢行驶。
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