But recent discoveries suggest that strokes and heart attacks may have been bedeviling humans for millenia.
但最新研究发现，中风和心脏病很可能已经困扰了人类几千年。
2
Previous changes in carbon dioxide levels were due to natural factors, such as rock weathering, and occurred very sluggishly, over many millenia.
以前二氧化碳的含量水平变化是因为自然因素，像持续数千年缓慢进行的岩石风化。
3
For the record, the body of water in question has been known - in maps, literature and official usage - as the Persian Gulf for more than two millenia.