a note on time schedules

  From my experience over many years in teaching,I have become a firm believer in setting a goal for all learning and a schedule for reaching that goal.
  You will discover that each chapter is divided into approximately equal sessions,and that each session will take from thirty to forty-five minutes of your time,depending on how rapidly or slowly you enjoy working–and bear in mind that everyone has an optimum rate of learning.
  For best result,do one or two session at a time–spaced studying with time between sessions so that you can assimilate what you have learned,is far more efficient,far more productive,than gobbling up great amounts in indigestible chunks.
   Come back to the book every day,or as close to every as the circumstances of your life permit.
  Find a schedule that is comfortable for you ,and then stick to it.
  Avoid interrupting your work until you have completed a full session,and always decide,before you stop,exactly when you will plan to pick up the book again.
  Working at your own comfortable rate,you will likely finish the material in two to three months,give or take a few weeks either way.
  However long you take,you will end with a solid feeling of accomplishment,a new understanding of how english words work,and --most important–how to make words work for you .
[new word]
assimilate 吸收，吸取
indigestible 难以消化的
circumstance 环境，情况
accomplishment 成就