n.碘；碘酒
Lack of iodine is a common cause of trouble. 缺碘是造成麻烦的常见原因。
Iodine tends to localize in the thyroid. 碘容易集于甲状腺。
It smarts when iodine is put on a cut. 碘酒涂在伤口上真杀得慌。
