The most common cause of hypocalcemia is PTH deficiency, resulting from decreased function of the parathyroid glands or hypoparathyroidism.

低钙血症最常见的原因是甲状旁腺功能降低或甲状旁腺功能低下引起的PTH缺乏。

Less calcium entering the blood is the most common cause and can be due to hypoparathyroidism, or lower levels or lower activity of parathyroid hormone.

钙离子进入血液的量减少是最常见的原因，可能是由于甲状旁腺功能减退或者甲状旁腺激素的量或者活性降低。

All right, so since, again, parathyroid hormone causes excretion of phosphate and reabsorption of calcium, then another cause of hyperphosphatemia is hypoparathyroidism, when the parathyroid glands don't produce enough parathyroid hormone in the first place.

因为甲状旁腺激素会导致磷酸盐的排泄以及钙的再吸收，那引发高磷血症的另一原因就是甲状旁腺功能减退，也就是当甲状旁腺首先不能产生足够的甲状旁腺激素时。