The internal urethral sphincter automatically and involuntarily opens, and the urine is released.

尿道内自然而然的张开，尿就排出来了。

Whooshing downwards, the fluid enters the urethra and stops short at the external urethral sphincter.

液体飞速的向下流进尿道，从膀胱经尿道排出体外。

Here the male urethral sphincter contracts to make sure urine doesn't mix with semen.

在这里，男性尿道收缩以确保尿液不精液混合。

Simultaneously, the internal urethral sphincter opens. This is called the micturition reflex.

同时，内壁开始打开。这叫做排尿反射。

In men and women, around the internal urethral orifice, the detrusor muscle thickens to form the internal sphincter.

无论男性女性，尿道内口的逼尿增厚，形成尿道内。

Simultaneously, the internal urethral sphincter opens.

同时，尿道内打开。

The urethra is a thin muscular tube that drains urine from the bladder, starting from the internal urethral orifice to the external opening.

尿道是细的性管道，从膀胱引流尿液；起于尿道内口，终于尿道外口。

The brain can counter it if it's not a good time to urinate by sending another signal to contract the external urethral sphincter.

通过发射另一个信号来控制尿道外大断现在是不是排尿的合适时机。

The urethral sphincter is a collective name for the muscles used to control the flow of urine from the urinary bladder.

尿道是用来控制尿液从膀胱流出的肉的总称。

The external urethral sphincter is one of the muscles of the pelvic floor, and it provides support to the urethra and bladder neck.

尿道外是一种盆底，它向尿道和膀胱颈提供支撑。

This tells the detrusor to contract while the internal urethral sphincter simultaneously opens, and the external sphincter relaxes so that the pee can flow out.

这告诉逼尿收缩，同时尿道内打开，外放松，以便尿液流出。

But under normal circumstances, your decision to urinate stops the brain's signal to the external urethral sphincter, causing it to relax and the bladder to empty.

但是在正常情况下，你要排尿的决定阻止了大向尿道外发出信号使得它开始放松，膀胱排空。

The original group examined by the researchers was made up entirely of people with prostate or urethral gland cancer, and included only one woman among 100 subjects.

研究人员检查的原始组完全由前列腺癌或尿道腺癌患者组成， 并且在 100 名受试者中仅包一名女性。

But let's assume for the sake of polite conversation that you have found an appropriate location to relieve yourself: Your urine enters the thin but muscular urethra by passing through the internal urethral sphincter.

但是为了礼貌的谈话，让我们假设你已经找到了一个合适的位置来缓解自己：你的尿液通过尿道内进入薄而肉发达的尿道。

The floor of the bladder has a smooth triangular region called the trigone region - with two corners at the ureterovesical junctions and the third corner being the internal urethral orifice, where the bladder meets the urethra.

膀胱的底部有一个光滑的三角形区域，称为膀胱三角；其中两角顶端为输尿管-膀胱连接处，第三角定点为尿道内口；膀胱尿道通过尿道内口相通。

In an anatomical female, that involves the vulva, which includes the mons pubis over the pubic bone, and labia majora and labia minora — the elongated skin folds that surround the vestibule, which contains both the urethral and vaginal openings.

在解剖学女性中，这涉及外阴，包耻骨上的耻骨，大阴唇和小阴唇——前庭周围的细长皮肤褶皱，前庭包尿道口和阴道口。