六级Clothes and other items that need to be tried on such as diamond rings and gold necklaces are generally not suited to virtual retailing, and, of course, items with a low value- to-weight ratio.

需要试穿的衣服和其他物品，如钻石戒指和金项链，通常不适合虚拟零售，当然，还有价值重量比较低的物品。

2015年12月六级真题（第一套）听力 Section C

六级This increases the student-teacher ratio by a factor of close to a thousand.

这使师生比例增加了近千倍。

2014年6月大学英语六级考试真题（三）

四级In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate (区分) the lead sources.

Boutron博士在他的新研究中发现，美国使用的含铅汽油中不同形式的铅的比例与欧洲、亚洲和加拿大汽油的比例不同，从而使科学家能够区分(区分) 铅源。

2005年1月大学英语四级(CET-4)真题

四级The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States.

格陵兰雪中的主要铅含量与美国汽油中的铅含量相当。

2005年1月大学英语四级(CET-4)真题

考研There are about 105 males born for every 100 females, but this ratio drops to near balance at the age of maturity, and among 70-year-olds there are twice as many women as men.

2000年全国硕士研究生入学统一考试英语试题