The Canadian Cancer Society says the daily upper safety limit is 2,000 units, and that their recommendation of 1,000 IU takes into account itamin D from diet and other sources.是什么意思_The Canadian Cancer Society says the daily upper safety limit is 2,000 units, and that their recommendation of 1,000 IU takes into account itamin D from diet and other sources.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句