shoal

Compared meaning: a group of fish swimming together (noun).

比较义项：鱼群（名词）。

• school

  School describes fish, usually of the same species, swimming together in a tight, coordinated, synchronized way, almost moving as one body; also the more formal zoological term.

  school表示（通常是同一种）鱼群一起游动，动作整齐划一，几乎像一个整体在移动；也是更偏正式的动物学用词。

  The school of herring turned sharply together, as if choreographed.

  那群鲱鱼一起急转弯，动作整齐得像是排练过一样。

• shoal 本词

  Shoal is the everyday, general word for a loose group of fish gathered together, without implying the tight, synchronized movement that school suggests.

  shoal是更通俗、更宽泛的说法，指松散聚在一起的鱼群，并不强调像school那样整齐同步的游动。

  A shoal of fish drifted near the pier, spreading out as the tide shifted.

  一群鱼在码头附近漂游，随着潮水变化而四散开来。

Both words mean a group of fish. School stresses that the fish move together in a tight, coordinated, synchronized way, almost like one body; it is also the more formal, scientific term. Shoal is the everyday word for fish gathered together, without that synchronized movement.

这两个词在“鱼群”这个意义上很接近，但school强调鱼群整齐划一、同步游动的状态，语气更偏正式、更强调秩序；shoal是更普通、更中性的说法，只表示鱼聚在一起，不强调同步性。这里不比较school的“学校”“学派”等其他意义。

Compared meaning: a shallow area of water (noun).

比较义项：浅滩，水浅的区域（名词）。

• shallow

  A general, everyday noun for an area where the water is not deep; often used in the plural 'the shallows' and in casual contexts like swimming or wading.

  泛指水不深的区域，是较通俗的日常说法；常用复数形式 the shallows，多用于游泳、涉水等日常语境。

  The water near the beach is shallow enough for children to stand.

  海滩附近的水浅到孩子们可以站得住。

• shoal 本词

  A more specific, often nautical term for a shallow area with a sandbank beneath the surface, frequently mentioned as a hazard to boats or a habitat for fish.

  更专业、常用于航海语境的说法，指水下有沙洲的浅水区，常被提到是船只的航行危险或鱼类聚集的地方。

  The captain steered carefully to avoid the shoal near the harbor.

  船长小心驾驶，避开了港口附近的浅滩。

Shallow and shoal both mean an area of water that is not deep. Shallow is general, often plural 'the shallows', used for swimming or wading. Shoal is nautical: a shallow area with a sandbank, often a hazard to boats. Shallow as an adjective, not compared.

两词都指水深较浅的区域，但 shoal 更强调水下有沙洲、常与鱼群或航行危险相关，属于较正式或专业的用法；shallow 是更通俗、宽泛的说法，只强调水不深，常用复数形式 the shallows。这里不比较 shallow 作形容词表示“浅的”或比喻“肤浅的”的用法。