B

英 [biː]

美 [biː]

n. 英语字母表的第2个字母; B音(C大调的第7音或音符); (学业成绩)第二等，良
symb. B级公路(英国公路代号，后接数字)

BNC.2992

习惯用语

from A to B

noun

英语字母表的第2个字母
the second letter of the English alphabet
1. ‘Butter’ begins with (a) B/‘B’.
  butter一词以字母b开头。
B音（C大调的第7音或音符）
the 7th note in the scale of C major
（学业成绩）第二等，良
the second highest mark/grade that a student can get for a piece of work
1. She got (a) B in/for History.
  她的历史科成绩是良。
（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
1. Shall we go for plan A or plan B?
  我们选用第一方案还是第二方案？
（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. Let's pretend A meets B in the park.
  假设甲某和乙某在公园里相遇。

symbol

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. the B1224 to York
  通往约克郡的B1224号公路

英语字母表的第2个字母
Bis the second letter of the English alphabet.
C大调音阶中的第七音；B音
In music,Bis the seventh note in the scale of C major.
（作业、考试等的）乙等，良好
If you get aBas a mark for a piece of work or in an exam, your work is good.
（用于首字母为b的一些单词的缩写，如born）
Borbis used as an abbreviation for words beginning with b, for example 'born'.

A+ b and A-B are both factors of a2-b2.
a+b和a-b都是a2-b2的因式。
Suppose A equals B.
假定A等于B。
A squared plus B squared equals C squared.
A的平方加上B的平方等于C的平方。
I'm giving him a B minus.
我准备给他一个B—。
She went from a D in her mocks to a B in the real thing.
她模拟考试得了D，到了真正考试的时候却拿了个B。
We use juxtaposition to denote conjunction, ab means both a and B.
我们利用并列表示合取，ab意味着a与b两者。
We should require that every student is immunized against hepatitis B
我们应要求每个学生都注射乙肝疫苗。
There are B& Bs all over the islands.
提供住宿和早餐的家庭旅馆遍布全岛。
Assign the letters of the alphabet their numerical values — A equals 1, B equals 2, etc.
给字母表里的每个字母赋予相应的数值——A等于1，B等于2，等等。
We joined point a to point B in a straight line.
我们画一直线把a点和b点连接起来。