1.字母英语:letter,英 [ˈletə(r)] 美 [ˈletər]。
2.你的工作是把他们按字母顺序分组,然后按数字顺序排序。Your job is to group them by letter and put them in numerical order.
3.农场主布朗的牛都烙上了字母“B”的印记。Farmer Browns cattle are branded with the letter B.