The great barrier reef , the largest living structure on earth , is the product of billions of tiny organisms called polyps which secrete calcium carbonate during photosynthesis to form coral .
This reef structure is composed of and built by billions of tiny organisms , known as coral polyps .
数十亿被称为珊瑚虫的微小生物组成及够造出这种珊瑚结构。
As temperatures rise , the algae dies or is ejected by the polyps , which leads to coral bleaching .
随着气温升高,藻类不是死亡就是被水螅排出,从而导致珊瑚漂白化。
Another study suggested a higher risk of precancerous polyps among users of folic acid compared with those in a placebo group .
另一个研究显示叶酸服用者相比服用安慰剂的实验对照者有患恶性息肉的风险。
Such people are now sometimes advised by their doctors to take nsaids as an adjunct to surgery to prevent polyps from recurring .
这些人群现在有时接受医生的建议来服用阿司匹林作为手术的辅助治疗来防止息肉的复发。
If polyps were found during your procedure , you will need to have a repeat colonoscopy .
如果在检查中发现息肉,你需要做一次结肠镜复查。
Back in 1994 , we came up with a theory that most bowel cancers arise from polyps , and most polyps in the lower bowel develop by the time you 're 60 .