Phosphate ion has a three charge, so it bonds with three hydrogen ions to form phosphoric acid.

磷酸根离子带有三个电荷， 因此它与三个氢离子结合形成磷酸。

If calcium levels fall, the four parathyroid glands buried within the thyroid gland release parathyroid hormone which frees up both calcium and phosphate ions from the bones.

如果钙水平下降，那么在甲状腺内的四个甲状旁腺释放甲状旁腺激素，导致骨骼中释放钙和磷酸盐离子。

Another possibility is not absorbing enough through the gastrointestinal tract, because usually phosphate ions are absorbed in the GI tract, but some substances like alcohol or a medication can impair that phosphate absorption, which means it gets excreted.

另一种可能是胃肠道吸收不足，因为磷酸盐离子通常会被消化道吸收，但有些物质，如酒精或药物，会损害磷酸盐的吸收，也就意味着磷酸盐会被排出体外。