书后有注解。There are explanatory notes at the back of the book.把你的答案同书后的答案核对一下.Check your answers with the key at the back of the book.这本教科书里要使用的词汇表印在书后.The vocabulary used in the course book is printed at the back....
To emancipate all mankind, we will balk at no sacrifice . even that of our lives.为了全人类的解放, 即使牺牲生命也在所不惜.That was a balk to us.那对我们是个挫折.Balk the purpose of those who threaten us.遏止那些威胁我们的人的目的....