High levels of heme iron in the diet raised the risk of developing gall stones by 21 percent, whereas high levels of non-heme iron seemed to have no effect.是什么意思_High levels of heme iron in the diet raised the risk of developing gall stones by 21 percent, whereas high levels of non-heme iron seemed to have no effect.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句