英國研究指出 癌症增加是由體重引起的

Being overweight or obese is a growing cause of cancer in the UK while cases caused by smoking are falling, according to a large study.

據一項大型研究顯示，超重或肥胖是英國癌症日益增長的原因，而吸菸導致的病例則正在下降。

Cancer Research UK found more than a third of all cases of cancer were avoidable - some 135,000.

英國癌症研究所發現，超過三分之一的癌症病例是可以避免的--即大約13.5萬例。

The charity also found that excess weight now caused 6.3% of all cancer cases - up from 5.5% in 2011 - while smoking as a cause had declined.

該慈善機構還發現，超重現在佔所有癌症病例的成因的6.3%--從2011年的5.5%有所上升，而吸菸作爲成因已經下降。

Cancer Research UK found the country with the greatest proportion of preventable causes of cancer was Scotland with 41.5%, followed by Northern Ireland on 38%, Wales on 37.8%, and England on 37.3%.

英國癌症研究所發現，可預防癌症成因的比例最高的國家是蘇格蘭，佔41.5%，其次是北愛爾蘭38%，威爾士37.8%，英格蘭37.3%。

Across the UK, smoking remained by far the leading cause of preventable cancer, although it dropped from 19.4% in 2011 to 15.1%.

在整個英國，吸菸仍然是導致可預防癌症的主要原因，但從2011年的19.4%降至15.1%。

Second was being overweight or obese, and third was exposure to UV radiation from the sun and sunbeds.

其次是超重或肥胖，第三是暴露於太陽和日光浴牀的紫外線輻射。

The standard way of diagnosing if someone is obese is by calculating their body mass index (BMI). It measures whether you're a healthy weight for your height.

診斷是否肥胖的標準方法是計算其體重指數（BMI）。它可以衡量你是否有一個健康的身高體重比。

A BMI of more than 25 means you're overweight and a BMI of more than 30 means you're classified as obese, although there are some exceptions.

BMI超過25就意味着你超重，BMI超過30則意味着你被歸類爲肥胖，儘管這其中存在一些例外。