the urethra
指具体管道时通常加定冠词 the。
The urethra carries urine from the bladder to the outside of the body.
尿道将尿液从膀胱输送到体外。
尿道
urethrae — plural of urethra
尿液排出体外的管道；在雄性胎生哺乳动物中为精液射出的管道。；大多数哺乳动物排尿的管道,同时作为男性生殖管道；尿道；[医] 尿道
the tube that carries urine out of the body; in male mammals it also carries semen
尿液排出体外的管道；在雄性胎生哺乳动物中为精液射出的管道。
The tube through which urine exits the body and, in male placental mammals, through which semen is ejaculated.
大多数哺乳动物排尿的管道,同时作为男性生殖管道
duct through which urine is discharged in most mammals and which serves as the male genital duct
The doctor explained that the urethra carries urine from the bladder out of the body.
医生解释说，尿道将尿液从膀胱排出体外。
用法提示：句中 urethra 是名词，作主语，指尿液排出体外的管道，译为“尿道”。
An infection can make the urethra feel sore.
感染会使尿道感到酸痛。
用法提示：句中 urethra 是名词，作 make 的宾语，指尿道，符合本义。
In biology class, we studied the urethras of male and female rats.
在生物课上，我们研究了雄鼠和雌鼠的尿道。
用法提示：句中 urethras 是 urethra 的复数形式，作 studied 的宾语，指多条尿道。
指具体管道时通常加定冠词 the。
The urethra carries urine from the bladder to the outside of the body.
尿道将尿液从膀胱输送到体外。
表达“经由尿道”时常用 through the urethra。
The catheter was passed through the urethra.
导管经尿道插入。
用 of 结构表示所属关系。
The urethra of a male mammal also serves as the genital duct.
雄性哺乳动物的尿道也充当生殖导管。
grammar · medium
易错句子Urine passes through the ureter when you urinate.
正确表达Urine passes through the urethra when you urinate.
排尿时尿液排出体外的管道是尿道，英语为 urethra；ureter 是输尿管，指尿液从肾脏到膀胱的管道。两者不能混用，表达排尿过程必须用 urethra。
grammar · medium
易错句子Both urethra can become infected.
正确表达Both urethras can become infected.
urethra 是可数名词，复数形式为 urethras（也作 urethrae）。both 后接复数可数名词，不能用单数；汉语名词没有复数变化，所以容易漏掉 -s。
男性尿道
The male urethra also carries semen.
男性尿道也输送精液。
女性尿道
The female urethra is shorter than the male's.
女性尿道比男性的短。
堵塞的尿道
A blocked urethra makes urination difficult.
尿道堵塞会导致排尿困难。
尿道狭窄
The narrowing of the urethra requires surgery.
尿道狭窄需要手术治疗。
尿道感染
An infection of the urethra needs prompt treatment.
尿道感染需要及时治疗。
无前缀；词根 urethr-（意为“尿道”）+ 名词后缀 -a。同根词：urethral（尿道的）、urethritis（尿道炎）。
Dictionary facts from ECDICT, WIKTIONARY.