1
a leech
基本用法，表示水蛭这种动物。
The doctor removed a leech from the patient's leg.
医生从病人的腿上取下了一只水蛭。
水蛭；蚂蟥
先理解核心含义，再看它在真实句子里的用法。
水蛭；蚂蟥
a small blood-sucking worm that lives in water
The doctor removed a leech from the patient's leg.
医生从病人的腿上取下了一只水蛭。
蛭纲下通常水生的吸血环节动物,尤其是医用水蛭
A typically aquatic blood-sucking annelid of the subclass Hirudinea, especially Hirudo medicinalis.
横帆的垂直边缘
The vertical edge of a square sail.
肉食或吸血的水陆生蠕虫,通常两端有吸盘
carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end
以寄生方式从他人身上获取利益的人
A person who derives advantage from others in a parasitic fashion.
Leeches are often found in freshwater ponds and streams.
水蛭经常出现在淡水池塘和溪流中。
The corrupt official acted like a leech, draining the public funds.
那个腐败官员就像吸血鬼一样，榨取公共资金。
He is a social leech who always relies on others for money.
他是个社会寄生虫，总是依靠别人给钱。
基本用法，表示水蛭这种动物。
The doctor removed a leech from the patient's leg.
医生从病人的腿上取下了一只水蛭。
比喻用法，指榨取他人利益的人。
He is just a leech on his parents, never working.
他只是他父母身上的吸血鬼，从不工作。
leech用作定语修饰名词，常见于医学术语。
Leech therapy has been used for centuries.
水蛭疗法已经使用了几个世纪。
Not this
He is a leak, always taking money from others.
Use this
He is a leech, always taking money from others.
leak（泄漏）与leech（水蛭；吸血鬼）发音相似，但意思不同。此处指剥削他人的人，应用leech。
Not this
There are many leech in the swamp.
Use this
There are many leeches in the swamp.
leech是可数名词，复数形式为leeches，不能省略-s。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
医用水蛭
The medicinal leech secretes an anticoagulant to keep blood flowing.
医用水蛭分泌抗凝血剂以保持血液流动。
水蛭疗法
Doctors sometimes use leech therapy to relieve pressure on swollen tissue.
医生有时用水蛭疗法来缓解肿胀组织的压力。
社会寄生虫
My roommate is a social leech; she never pays for anything.
我的室友是个社会寄生虫；她从不为任何东西付钱。
社会的寄生虫；靠他人养活的人
People called him a leech on society because he never worked and lived on benefits.
人们称他为社会的寄生虫，因为他从不工作，靠救济金生活。
像水蛭一样粘着不放
The new intern sticks like a leech to the manager.
新来的实习生像水蛭一样粘着经理不放。
像水蛭一样跟着某人转
He followed me around like a leech all evening, asking for favors.
他整个晚上像水蛭一样跟着我转，求我帮忙。
发长 /iː/ 音 (如 see, free)
Use leech naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
水蛭两端有吸盘，吸住宿主不松口；由此记住 leech 也指'寄生者、吸血鬼'。
语域：neutral 常见场景：生物学、医学、自然话题 作“水蛭”这一本义时，通常用于生物学、医学或自然类描述，语气中性；在日常口语中也会出现，没有特别的正式或非正式色彩。
The noun 'leech' is countable. Its plural form is 'leeches'.
Dictionary facts from ECDICT, WIKTIONARY.