free thyroxine的用法和样例：
例句
- This had no effect on the time to normalization of free thyroxine.
这对游离甲状腺素恢复正常的时间没有影响。 - The baby was biochemically hyperthyroid and had elevated levels of total and free thyroxine and normal levels of triiodothyronine, indicating thyroxine toxicosis.
血生化检查发现婴儿甲状腺机能亢进，总甲状腺素和游离甲状腺素水平升高，碘甲腺氨酸钠水平正常，提示甲状腺素中毒。
