1
have/get an erection
常用于指男性性兴奋时的生理反应。
He had an erection during the movie.
他在看电影时勃起了。
勃起
erections — plural of erection
先理解核心含义，再看它在真实句子里的用法。
勃起
the process or state of a penis or clitoris becoming erect; an erect penis or clitoris
He had an erection during the movie.
他在看电影时勃起了。
建造或组装某物的行为。
The act of building or putting up or together of something.
勃起
an erect penis
任何建造或竖立起来的东西。
Anything erected or built.
建筑物；构造物
a structure that has been erected
The erection of the new museum will begin next spring.
新博物馆的建造将于明年春天开始。
The workers completed the erection of the steel bridge in just six months.
工人们仅用六个月就完成了钢桥的搭建。
They are responsible for the erection of the temporary stage for the concert.
他们负责为音乐会搭建临时舞台。
常用于指男性性兴奋时的生理反应。
He had an erection during the movie.
他在看电影时勃起了。
The erection of the new bridge took two years.
新桥的建造花了两年时间。
The doctor said he has difficulty maintaining an erection.
医生说他难以维持勃起。
Not this
He has erection.
Use this
He has an erection.
英语中“erection”是可数名词，通常需要冠词或限定词。中文学习者容易遗漏冠词，因此需要加上不定冠词“an”。
Not this
He erects in the morning.
Use this
He has an erection in the morning.
“erection”是名词，而“erect”是动词，表示“建造”或“竖起”，不用于描述生理状态。正确表达应用名词短语“have an erection”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
勃起
Many men have erections during sleep.
许多男性在睡眠中会勃起。
产生勃起
He got an erection while watching the movie.
他看电影时产生了勃起。
建筑物的建造
The erection of the building was completed ahead of schedule.
该建筑物的建造提前完成了。
雕像的竖立
The erection of the statue was a significant event.
雕像的竖立是一个重大事件。
维持勃起
Some men find it difficult to maintain an erection.
有些男性发现难以维持勃起。
勃起问题
He consulted a doctor about his erection problems.
他就勃起问题咨询了医生。
我勃起了，但后来软了。
From the movie 'The 40-Year-Old Virgin' (2005), the character Andy says: 'I had an erection, but it went away.'
出自电影《四十岁的老处男》（2005），角色安迪说：“我勃起了，但后来软了。”
Use erections naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆法：erect（直立）+ -ion，想象一根直立的柱子。
语域：mixed 常见场景：medical、colloquial 通常用于医学或生物学语境，但在日常谈话中也很常见，整体语域混合。
表示“建造/竖立”的动作或“机构设立”时通常不可数；表示“勃起”或“已竖立的物体”时可数。
Dictionary facts from ECDICT, WIKTIONARY.