并且大部分食物都在本地自产自销，所以碘较少的地区就会出现碘缺乏和甲状腺肿大。

And because historically most of the food consumed was locally grown, the inhabitants of iodine-poor regions tended to develop iodine deficiency, and goiters.

youdao

并且大部分食物都在本地自产自销，所以碘较少的地区就会出现碘缺乏和甲状腺肿大。

And because historically most of the food consumed was locally grown, the inhabitants of iodine-poor regions tended to develop iodine deficiency, and goiters.

youdao