1
a sample of semen
semen 通常不可数，表示一份样本时用 a sample of semen。
The clinic asked for a sample of semen.
诊所要求提供一份精液样本。
精液
先理解核心含义，再看它在真实句子里的用法。
精液
the thick white fluid containing spermatozoa that is ejaculated by the male genital tract
The clinic asked for a sample of semen.
诊所要求提供一份精液样本。
A sticky, milky fluid produced in male reproductive organs that contains the reproductive cells.
男性生殖道射出的含有精子的浓稠白色液体
the thick white fluid containing spermatozoa that is ejaculated by the male genital tract
The biology teacher explained that semen contains sperm cells.
生物老师解释说精液含有精子细胞。
The laboratory analyzed a sample of semen for the fertility test.
实验室分析了一份精液样本用于生育力检测。
Doctors sometimes freeze semen for future use in reproduction.
医生有时会冷冻精液以备将来在生殖中使用。
semen 通常不可数，表示一份样本时用 a sample of semen。
The clinic asked for a sample of semen.
诊所要求提供一份精液样本。
Semen analysis is used to check male fertility.
精液分析用于检查男性生育能力。
He donated semen to a sperm bank.
他向精子库捐了精。
Not this
The lab tested a semen from the donor.
Use this
The lab tested a semen sample from the donor.
semen 是不可数名词，不能直接用 a 修饰；改成 a semen sample 后，a 修饰的是可数名词 sample，语义不变。
Not this
Semen are collected in the clinic.
Use this
Semen is collected in the clinic.
semen 是集合性物质名词，作主语时谓语动词要用单数；把 are 改为 is 与不可数名词保持一致。
Not this
There was a drop semen on the floor.
Use this
There was a drop of semen on the floor.
单位词 drop 后接不可数名词时必须用 of 来连接，drop of semen 才是正确结构；省略 of 是受中文量词直接修饰名词的影响。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
精液分析
The doctor ordered a semen analysis to check the patient's fertility.
医生要求做精液分析以检查患者的生育能力。
精液样本
He provided a semen sample at the clinic.
他在诊所提供了精液样本。
精液捐献
Semen donation is regulated in many countries.
许多国家对精液捐献有严格规定。
精液量
Decreased semen volume can be a sign of a health issue.
精液量减少可能是健康问题的征兆。
精液质量
Smoking can affect semen quality.
吸烟会影响精液质量。
Use semen naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
semen 音似“see men”，想象看到男性体内排出的白色液体，那就是精液。
语域：neutral 常见场景：医学、生物学、法医学 semen 是客观、正式的中性词，多用于医学、生物学或法医学等专业场合；日常口语中通常较少直接使用，可随语境译作“精液”。
Seaman and demon rhyme with semen (/ˈsiːmən/). Specimen and women are spelling lookalikes ending in "men" but do not rhyme: specimen is /ˈspɛsɪmən/, women is /ˈwɪmɪn/. Note that semen's first vowel is long /iː/, as in see, not /ɛ/.
Dictionary facts from ECDICT, WIKTIONARY.