That note should be B flat, not B.(那個音應該是降B音，而不是B音。)

Shall we go for plan A or plan B?(我們采用第一方案還是第二方案？)

Let x be the sum of a and b.(設x為a加b之和。)

In the first two experiments, either the butter or the letter "B" plays a role.(在前兩個實驗中，黃油或字母“B”起了作用。)

Draw a line from a to B.(從A到B劃一條線。)

This time, instead of butter, the toast had a letter "B" written on one side.(這一次，在吐司的一邊沒有涂黃油，而是寫了一個字母“B”。)

Mr. A was counsel for the plaintiff, and Mr. B for the defendant.(A先生作原告的辯護人，B先生作被告的辯護人。)

Either A or B matches it.(不是A與它匹配，就是B與它匹配。)

I was assigned to B platoon.(我被派到B排工作。)

The 'b' in 'lamb' is silent.(lamb中的b不發音。)