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1·Endogenous fecal excretion was measured in a subset of children, and net calcium balance was calculated.

在部分孩子中测定钙的排泄量，计算钙的代谢平衡。

2·The sense of daily urinary and fecal zinc excretion were rather limited.

每日尿锌和粪锌的排泄量则有一定的局限性。