B—

1.[c][u]英语字母表的第 2 个字母the second letter of the English alphabet

3.[c][u]（学业成绩）第二等，良the second highest mark/grade that a student can get for a piece of work

4.[u]（表示两个或两个以上可能性中的）第二个used to represent the second of two or more possibilities

5.[u]（假设的或不指出姓名身份的第二人）乙，乙某used to represent a person, for example in an imagined situation or to hide their identity

1.B 级公路（英国公路代号，后接数字）used in Britain before a number to refer to a particular secondary road

1.(=billion)十亿

1.英语字母表的第二个字母

2.(学习成绩) 乙等,良好

3.【乐】B调; B音

4.【医】B型血

1.(=billion)

1.the second letter of the english alphabet

2.the second highest grade in a series, e.g. an above-average grade for academic work

3.[Music]the musical key based on the note B; the seventh note of a scale in C major

4.[Medical & Healthcare]a human blood type, containing the b antigen