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例句：

1. 1. The testicles are located in the scrotum, which is a sac that encloses the spermatic cords and thevas deferens.
   睾丸位于阴囊内，阴囊是一个包裹着输精管和精索静脉的囊状结构。
2. 2. The testicles are responsible for producing sperm and releasing it into the seminal fluid.
   睾丸负责产生精子并将其释放到精液中。
3. 3. In some cases, the testicles may be removed during surgery to treat certain conditions.
   在某些情况下，手术可能会切除睾丸以治疗某些疾病。