美国GRE写作argument全部官方范文分析(12)(2)

　　Besides iron, other elements or compounds in the red meat could also have a impact on the respondents. It is critical to clear that how many compounds and elements exist in the red meat, and most importantly, how they function. Even a fine quantity of these, could impact on the respondents. It is possible that one or several non-iron compounds or elements in the red meat caused the heart disease. Also, it is entirely possible that, the way they cook and the container of the red meat, lead to heart disease. That is to say, maybe there are some heart-disease-related elements on the inside surface of the container, and it is cooked so thoroughly for a long time that these elements have taken off from the container and immerged to the red meat. In that case, the increased risk of heart disease may ascribe to these, other than iron.

　　Although the correlation between the red meat and the heart disease is well established, we should investigate more details about elements and compounds within the red meat. Without ruling out the influence of these, we could not conclude that the iron contained in the red meat is the cause, which would mislead our effort of research and waste our funding, time and even lives.

（责任编辑 陈奕璇）