词汇精练——margins

正确答案： A
托福词汇：margin 英['mɑ:d？？n]美[？mɑrd？？n]
n.边缘，范围;极限;利润，盈余;(版心外)的空白
vt.留边;成为…的边;加边于，围绕;为…加旁注
名词复数:margins
[例句]Second , margin loans are callable.其次，保证金贷款随时可以收回。
But in many cases consumers are misled if they believe organic foods can maintain health and provide better nutritional quality than conventionally grown foods. So there is real cause for concern if consumers, particularly those with limited incomes, distrust the regular food supply and buy only expensive organic foods instead.