diffident
adj
~ (about sth) not having or showing much belief in one's own abilities; lacking self-confidence 对自己的能力缺乏信心的; 露出怯态的; 缺乏自信的
an able but diffident young student 能干但缺乏自信的青年学生
Don't be so diffident about your talents. 别对自己的才能如此缺乏信心.
Other books are for reading slowly and carefully. If it is a book on a subject that you are interested in, you will want to chew and digest it. That does not mean reading it too slowly. When you pick up a book for the first time, check that it is not to