Oh! Good afternoon. Mr. Wilson, I'm sorry, but he's not in. He's gone out on business.
哦,您好!威尔逊先生。很抱歉,他不在家,他出差了。
No one can plead ignorance of a subject any longer, for these are countless do-it-yourself publications.
由于出版了不计其数的教人自己动手做事的书报杂志,没有人再能说对某事一无所知。