psychologist 心理学家
By education and training,this practitioner is an expert in the dark mysteries of human behavior——what makes people act as they do,why they have certain feelings,how their personalities were formed——in short,what makes them tick.Such a professional is often employed by industries,schools,and institutions to devise means for keeping workers productive and happy,students well-adjusted,and inmates contented.With a state license,this person may also do private or group therapy.
通过学习和训练，该执业者是人类行为方面的专家——是什么让人们做出这样的行为，为什么他们有这种感受，他们的人格是如何形成的。简而言之，是什么让他们如此表现行为。这类专家经常被工业界，学校和研究所所雇佣，来设计一些方法，保持工人高产而且快乐，学生很好的适应环境，居民满意。当持有该州执照时，这类人也可能去做一些个人的或者小组的治疗。
psychoanalyst 精神分析学家
This practitioner is a physician,psychiatrist,or psychologist who has been specially trained in the techniques devised by Sigmund Freud,encouraging you to delve into that part of your mind called “the unconscious.” By reviewing the experiences,traumas,feelings,and thoughts of your earlier years,you come to a better understanding of your present worries,fears,conflicts,repressions,insecurities,and nervous tensions——thus taking the first step in coping with them.Treatment,consisting largely in listening to ,and helping you to interpret the meaning of ,your free-flowing ideas,is usually given in frequent sessions that may well go on for a year or more.
该执业者既是内科医生，精神病医师或者是心理学家。特别的是，他们学习的是佛洛依德发明的一些技术，帮助你深入你脑中被称之为 「潜意识」的部分。通过回忆你所经历的事情，精神创伤，感受以及你年轻时的想法，你就能更好的理解你的现在经历担忧，恐惧，冲突，压抑，没有安全感，神经紧张——从而走出克服它们的第一步。治疗的内容，很大一部分是倾听，并且帮你解释你那些自由流淌的想法。治疗通常会进行连续的几个阶段，通常需要一年或者更久。
orthodontist 牙齿矫正师
This practitioner is a dentist who has taken postgraduate work in the straightening of teeth. 这类执业者是一种牙医，专业是研究牙齿矫正。
optometrist 视力测量师
This practitioner measures your vision and prescribes the type of glasses that will give you a new and more accurate view of the world.
这类执业者测量你的实力，给你配合适的眼镜，你会看到全新的，更加清晰的世界。
optician 配镜师
This practitioner grinds lenses according to the specifications prescribed by your optometrist or ophthalmologist,and may also deal in other kinds of optical goods.
这类执业者会根据视力测量师或者眼科医生开出的说明为你磨制镜片，也许还会从事一些其他和光学产品有关的工作。
osteopath 整骨疗法家,整骨医生
This practitioner is a member of the profession that originated in 1874,what Andrew T.Still devised a drugless technique of curing diseases by massage and other manipulative procedures,a technique based on the theory that illness may be caused by the undue pressure of displaced bones on nevers and blood vessels. Training is equal to that of physicians,and in most states these practitioners may also use the same methods as,and have the full rights and privileges of,medical doctors.
这类执业者是起源于1874年的一种职业的一员，安德鲁·泰勒·史迪尔发明了一种通过按摩或者其他手法而不需使用药品就能治愈疾病的技术。这项技术基于这样一种理论，那就是疾病可能是由于错位的骨头，神经或者血管产生的不适当的压力所造成的。他们和内科医生受到的训练一样，在大多数的州这类执业者也会使用和其他医生一样的方法来治病，他们也有权这么做。
chiropractor 按摩师
The basic principle of this practitioner’s work is the maintenance of the structural and functional integrity of the nervous system.Treatment consists of manipulating most of the articulations of the body,especially those connected to the spinal column.Licensed and legally recognized in forty-five states,this professional has pursued academic studies and training that parallel those of the major healing professions.
这类执业者所从事的工作，其基本原理就是维护神经系统结构性和功能性的完整。治疗方法包括按摩全身大部分关节，尤其是脊柱。在45个州可以获得合法执照，该职业接受的教育和训练与大部分医生类似。
podiatrist 脚病医生
This practitioner treats minor foot ailments——corns,calluses,bunions,fallen arches,etc.,and may perform minor surgery.
这类执业者治疗脚上的小病——鸡眼，老茧，拇囊(炎)肿，足弓下陷等。
graphologist 笔迹学家
This practitioner analyzes handwriting to determine character,personality,or aptitudes,and is often called upon to verify the authenticity of signatures,written documents,etc.
这类执业者通过分析笔迹来判断字体，性格或者是态度，经常被请来鉴定签名，书写文件的真伪性。
gerontologist 老年医学家
This social scientist deals with the financial,economic,sexual,social,retirement,and other non-medical problems of the elderly.
这是一类社会学家，解决老年人面对的财务问题，经济问题，性问题，社交问题，退休问题和其他非医疗问题。
引用部分均来自：Word power made easy 一书 *****