It is bad manners tobeabsent-minded when other people talk to you.
别人同你讲话时出心不在焉是没礼貌的。
2
The fact that he will grow up tobe the absent-minded professor is the subject for another post.
我忘了。（事实上他长大成为不专心的教授是由于别的原因造成的。
3
Men who are habitually shamefaced or absent-minded before the ideal-that is, before the actual nature of things-cannot expect tobe real readers of books.