甲状腺位于颈部的底部附近，是一个很大的内分泌腺体，它产生激素，协助控制生长和新陈代谢。
Located near the base of the neck, the thyroid is a large endocrine gland that produces hormones that help control growth and metabolism.
大部分碘都被甲状腺吸收了，用于分泌调节人体新陈代谢的激素。
Most of that gets taken up by the thyroid and is used to make hormones that regulate metabolism.
如果你拥有较低的甲状腺激素水平，你的代谢率就比较低。
If you have low thyroid hormone levels, your metabolic rate is slowed.
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