有的书必须精读有的只要稍加涉猎即可的英文

some books are for intensive study and some are for cursory reading

• 有的:    some
• 书:    write
• 必须:    must; have to; be ...
• 精读:    read carefully and ...
• 只要:    so long as; provid ...
• 涉猎:    do desultory readi ...