篇章：Principles of Deliberate Practice on the Job———what is the principle？How to apply?
文章开始由US Navy Instructor Programme例子 引入话题可以通过区分每个领域的佼佼者的特长，据此设计相关训练可以将普通人变大师，那怎么辨别区分，又怎么进行训练？—— identify the top performers in a field and train other, lesser performers and bring them up closer to that top level。How to identify?and How to train others ？
Businesspeople 的例子说明在实践中训练的重要性，用对实践过程的实用可行性的的思考打磨技巧取得更大的进步——“learning while real work gets done” ～practicing and thinking about practicing.强调现实实践对于提高技术（horn the skill）的重要性
再通过通过影像科医生的例子有经验的影像学医生对于大量数据库建立，据此学习引出需要相关领域针对性的训练以及对于错误及时反馈修正，不断进步。——Top Gun approach, training with designed practice and immediate feedback
Summary
As author mentions, deliberate practice requires us to go outside comfort zone, get immediate feedback and identify the experts.Yet,we should break the three myths too,including old belief that "I can't ",doing enough must be bound to get better,try harder and get better.
No guarantee exists,however, that we'll be top level after doing all of these.These principles just increase the possibility of expert performance.
To acquire excellent level in your field,you need to practice and think about practicing ,namely "learning while real work get done ".Meanwhile,It's essential to train with Top Gun approach, that can provide designed practice and immediate feedback to you.
字词
1.This practice-driven mindset is very similar to that of expert performers, who are constantly practicing and otherwise seeking ways to hone their skills
hone one's skill 提高技能，精益求精。 perfect～sharpen
释义：to improve your skill at doing something, especially when you are alreadyvery good at it:
例句：He set about honing his skills as a draughtsman.
finely honed (=extremely well-developed) intuition
仿写：with the help of teacher,we can pick up essential skills,while it's necessary to horn the skill via consistent practice.
2. The catch was, of course, that the cost of that sort of on-the-job training was unacceptably high
catch ——生义
释义：a hidden problem or difficulty:潜在的问题困难～～可以替换常用的problem，question
例句：This deal looks too good to be true – there must be a catchsomewhere.
the catch is (that)
例句：The catch is that you can’t enter the competition unless you’ve spent$100 in the store.
仿写： The catch is that we can't get immediate feedback, if we don't have expert teacher .
3.They feed a seemingly insatiable appetite among their customers for anything that might provide a competitive edge
释义：always wanting more and more of something:贪得无厌的，不满足的
搭配：insatiable appetite/ desire/ demand etc (for something)
可以贬义：他对权力贪得无厌：his insatiable appetite for power；可以褒义：求知若渴 insatiable thirsty for knowledge
仿写：I deeply influenced by his spirit of insatiable thirsty for knowledge
4.if you do something for long enough, you’re bound to get better at it
be/ feel bound to do something 一定会，必然会
例句： Well, I’m bound to say (=I feel I ought to say), I think you’re taking ahuge risk.
be duty bound/ honour bound to do something
释义：to feel that you ought to do something, because it is morally right or yourduty to do it:
例句：A son is duty bound to look after his mother.
仿写：When we make mistakes，our parents are bound to correct these immediately.
①pretty much ～almost completely 描叙很大程度时可义替换下
②in part because =partly because部分原因是...说明原因时避免绝对增加准确性。
③set out to do...开始做，，
④range from ... to...可以用来描述一个整体中包含的几个部分range from A and B to C