1
a weir across [river/stream]
描述堰的位置时，介词常用 across，指横跨水体。
A weir across the river controls the water level.
河上的堰控制着水位。
低坝；堰
weirs — plural of weir
先理解核心含义，再看它在真实句子里的用法。
低坝；堰
a low dam built across a stream to raise its water level or divert its flow
A weir across the river controls the water level.
河上的堰控制着水位。
拦河调节水流的可调水坝
An adjustable dam placed across a river to regulate the flow of water downstream.
横跨溪流的低坝
a low dam built across a stream to raise its level or divert its flow
横跨河流捕鱼的栅栏
A fence placed across a river to catch fish.
捕捉或留住鱼的栅栏
a fence or wattle built across a stream to catch or retain fish
The old stone weir across the stream helps control the water level during heavy rain.
横跨溪流的那座古老石堰有助于在大雨时控制水位。
Farmers built several small weirs to direct water into the irrigation channels.
农民们修建了几座小堰，把水引到灌溉渠道里。
The engineers measured the height of the weir before deciding where to place the new fish ladder.
工程师们测量了堰的高度，然后决定在哪里放置新的鱼梯。
描述堰的位置时，介词常用 across，指横跨水体。
A weir across the river controls the water level.
河上的堰控制着水位。
build 是与 weir 搭配最常见的动词，也可用 construct。
The village built a weir to divert the stream.
村里建了一座堰来改变溪流的方向。
at the weir 表示在堰这个具体地点，常用于描述观察或捕捞场景。
Salmon gather at the weir during the spawning season.
鲑鱼在产卵季节聚集在堰边。
Not this
There are many weir in this river.
Use this
There are many weirs in this river.
英语可数名词复数需加-s；汉语名词没有复数变化，受母语影响易漏掉词尾。weir 是规则名词，复数形式为 weirs。
Not this
The old wire raises the water level upstream.
Use this
The old weir raises the water level upstream.
wire 意为金属丝，weir 意为低坝/堰；二者拼写相近但词义不同。描述抬升水位的拦水建筑物应用 weir。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
溢流堰
The overflow weir releases excess water during heavy rain.
暴雨期间，溢流堰排放多余的水。
鱼梁；捕鱼堰
Fishermen set up a fish weir across the stream.
渔民在溪流上架起了鱼梁。
引水堰；分水堰
A diversion weir channels water to the irrigation canal.
引水堰把水引到灌溉渠。
宽顶堰
Engineers measured the stream flow with a broad-crested weir.
工程师用宽顶堰测量溪流流量。
筑堰；建造堰
The villagers built a weir to raise the water level.
村民筑堰以提高水位。
堰顶
Water spilled across the weir crest.
水漫过堰顶。
《大坝》
The Weir, an award-winning play by Conor McPherson, takes its title from a low dam built across a stream.
《大坝》是康纳·麦克弗森的一部获奖戏剧，其剧名取自横跨溪流而建的低坝。
Use weirs naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
音近“we are”，想象我们说“我们筑坝拦水”；溪流中那道低坝就是 weir。
语域：formal 常见场景：水利工程、水文监测 weir 多用于水利工程、水文监测等专业语境，是一个较正式的技术性词汇；日常口语中通常直接用 dam 或 barrier 表达。
押韵词：ear、hear、fear 与 weir 都以 /ɪr/ 结尾（hear 是 /hɪr/，fear 是 /fɪr/）。小心拼写相似的 heir、their：它们以 -eir 结尾，但读 /ɛr/（同 air），不是 /ɪr/。weird 虽然以 weir 开头，但读 /wɪrd/，末尾多了 /d/。
Dictionary facts from ECDICT, WIKTIONARY.