1.字母的英语:letter,英 [ˈletə(r)] 美 [ˈletər]。
2.碱基是由不同的蛋白质构成的密码,颇像组成一些单词和句子的一个字母表的字母。The bases constitute a code for different proteins, much like the letters of an alphabet foiling words and sentences.
3.请在每一页上用姓名的首字母签署并在规定的空白处签字。Please initial each page and sign in the space provided.
4.这计算机程序不能辨别字母与数字。The computer program was unable to discriminate between letters and numbers.