shoal
noun uk/ʃəʊl/ us/ʃoʊl/
(FISH)
[ C, + sing/pl verb ]鱼群
a large number of fish swimming as a group
We could see shoals of tiny fish darting around. 我们可以看见一群群小鱼儿窜来窜去。
Piranhas often feed in shoals. 水虎鱼常常是成群地觅食。
(PEOPLE/THINGS)
[ C usually plural ] informal大批，大群（东西或人）
a large number of things or people
In the summer, tourists visit the city in shoals. 夏天，大批大批的游客到这个城市游览。
(RAISED AREA)
[ C ] geology specialized浅滩，沙洲
a raised area of sand or rocks under the surface of the water