shoal
shoal 英 [ʃəʊl] 美 [ʃoʊl]
n. 浅滩，沙洲；鱼群；潜在危险 vi. 变浅 vt. 使变浅；驶入
进行时:shoaling 过去式:shoaled 过去分词:shoaled 第三人称单数:shoals 名词复数:shoals
- The noun shoal can be used to refer to a group of fish or an area of shallow water. So when you’re navigating a shoal in your row boat, you might look down and see a shoal of fish swimming out of the way.
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- n. 浅滩，沙洲；鱼群；潜在危险
- vi. 变浅
- vt. 使变浅；驶入
- adj. 浅的
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1. Agrillo's team also found that mosquitofish can discriminate between numbers up to 16, but only if the ratio between the fish in each shoal was greater than 2:1.
阿格利罗的小组还发现，食蚊鱼甚至能辨别大到16的两个数字的大小，条件是这两组鱼群的数量要相差超过2:1。
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2. With experience, and with improved apparatus, it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
根据经验和改进了的仪器，不仅能够确定鱼群的位置，而且可以根据鱼群回声的特点分辨出是鲱鱼、鳕鱼，这是人们所熟悉的其他鱼。
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3. Recent research had shown that fish recognised individual "shoal mates", social prestige and even tracked relationships.
最近的研究表明鱼可以识别各自的鱼群伙伴，社会威望，甚至相关的人际关系。
- shoal (n.1) "place of shallow water," c. 1300, from Old English schealde (adj.), from sceald "shallow," from Proto-Germanic *skala- (source also of Swedish skäll "thin;" Low German schol, Frisian skol "not deep"), of uncertain origin. The terminal -d was dropped 16c.
- shoal (n.2) "large number" (especially of fish), 1570s, apparently identical with Old English scolu "band, troop, crowd of fish" (see school (n.2)); but perhaps rather a 16c. adoption of cognate Middle Dutch schole.
- shoal (v.) "assemble in a multitude," c. 1600, from shoal (n.2). Related: Shoaled; shoaling.
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