a swallow of sth
表示“喝一口、咽一口”的量，后面多接水、咖啡等液体或流质食物。
He took a swallow of coffee and went on reading.
他喝了一口咖啡，又继续看书。
燕子；燕科候鸟
swallows — plural of swallow
吞咽；一小口（食物或饮料）；（滑轮组的）绳孔；绳索通道；一口吞下的量；吞咽。；燕科的小型候鸟,翅膀长而尖,尾呈叉形,在飞行中捕食昆虫。；少量液体食物
a small migratory bird of the swallow family, with long pointed wings and a forked tail, that catches insects while flying
一口吞下的量；吞咽。
The amount swallowed in one gulp; the act of swallowing.
燕科的小型候鸟,翅膀长而尖,尾呈叉形,在飞行中捕食昆虫。
A small, migratory bird of the Hirundinidae family with long, pointed, moon-shaped wings and a forked tail which feeds on the wing by catching insects.
少量液体食物
a small amount of liquid food
滑轮组中绳通过的孔道。
The opening in a pulley block between the sheave and shell through which the rope passes.
吞咽的动作
the act of swallowing
以快速优雅飞行和规律迁徙著称的小型长翼鸣禽
small long-winged songbird noted for swift graceful flight and the regularity of its migrations
A swallow flew low over the lake, catching insects in midair.
一只燕子贴着湖面低飞，在空中捕食昆虫。
用法提示：swallow 在此为名词，指燕子这种鸟，在句中作主语。
AI contextual example
Every spring, thousands of swallows return to this village to build their nests under the roofs.
每年春天，成千上万只燕子回到这个村庄，在屋檐下筑巢。
用法提示：swallows 是名词 swallow 的复数形式，泛指燕子，在句中作主语。
AI contextual example
We sat on the porch and watched a pair of swallows feeding their chicks.
我们坐在门廊上，看着一对燕子喂它们的雏鸟。
用法提示：swallows 为名词复数，指燕子，此处作 watched 的宾语。
AI contextual example
表示“喝一口、咽一口”的量，后面多接水、咖啡等液体或流质食物。
He took a swallow of coffee and went on reading.
他喝了一口咖啡，又继续看书。
强调一次性咽下，常与 drink、finish 等动词连用。
She finished the whole glass of juice in one swallow.
她一口就把整杯果汁喝光了。
指“燕子”这种候鸟；泛指时常用复数 swallows 作主语。
Swallows fly south before the weather turns cold.
天气转冷前，燕子会飞往南方。
grammar · medium
易错句子I saw three swallow flying over the lake.
正确表达I saw three swallows flying over the lake.
英语中可数名词前有大于一的数词时必须用复数形式，swallow 的复数直接在词尾加 -s；汉语的“燕子”没有单复数形态变化，所以容易漏掉 -s。
grammar · medium
易错句子Swallow is a small bird with a forked tail.
正确表达The swallow is a small bird with a forked tail.
英语中单数可数名词作泛指的主语时必须带限定词，这里用 the swallow 表示“燕子这一类鸟”；汉语的“燕子”可以光杆名词直接作主语，受此影响容易写出不带冠词的 Swallow is...。
grammar · medium
易错句子He took a swallow water and went on reading.
正确表达He took a swallow of water and went on reading.
swallow 表示“一口（的量）”时，结构是 a swallow of + 名词，of 不能省略；汉语“一口水”是名词直接组合、没有介词，所以容易漏掉 of。
一口水
He took a swallow of water and kept running.
他喝了一口水，继续跑。
喝一口；咽一口
She took a quick swallow of coffee before answering.
她匆匆喝了一口咖啡才回答。
家燕（常见的燕科鸟类）
A barn swallow swooped low over the field.
一只家燕低低地掠过田野。
燕巢；燕子的窝
A swallow's nest clung to the beam under the roof.
一个燕巢紧贴在屋檐下的横梁上。
一群燕子
A flock of swallows circled above the lake at dusk.
黄昏时，一群燕子在湖面上空盘旋。
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