work 最普通用词，含义广，指人们日常生活和工作中所从事的有目的的体力或脑力劳动。
task 通常指分派给的任务，也指自愿的工作，但往往是艰巨或令人厌烦的工作。
job 多用于口语，侧重指受雇用的，以谋生为目的工作，不论有无技术，也不管是零工或散工。
参考例句
1. Let it work in their minds. 使其在他们思想上产生影响。
2. Work is work and play is play. 工作和游山玩水都是幸福的。
3. Calm down and go on your work. 安静下来，继续做你们的工作。
英英解释
n.
1. activity directed toward making or doing something
2. a product produced or accomplished through the effort or activity or agency of a person or thing
3. the occupation for which you are paid
4. applying the mind to learning and understanding a subject (especially by reading)
5. the total output of a writer or artist (or a substantial part of it)
6. a place where work is done
7. (physics) a manifestation of energy; the transfer of energy from one physical system to another expr v.
1. exert oneself by doing mental or physical work for a purpose or out of necessity
2. be employed
3. have an effect or outcome; often the one desired or expected
4. perform as expected when applied
5. shape, form, or improve a material
6. give a workout to
7. proceed along a path
8. operate in a certain place, area, or specialty
9. proceed towards a goal or along a path or through an activity
10. move in an agitated manner
11. cause to happen or to occur as a consequence
12. cause to work
13. prepare for crops
14. behave in a certain way when handled
15. have and exert influence or effect
16. operate in or through
17. cause to operate or function
18. provoke or excite
19. gratify and charm, usually in order to influence
20. make something, usually for a specific function
21. move into or onto
22. make uniform
23. use or manipulate to one's advantage
24. find the solution to (a problem or question) or understand the meaning of
25. cause to undergo fermentation
26. go sour or spoil
27. arrive at a certain condition through repeated motion
