work: may imply activity of body, of mind, of a machine, or of a natural force, or it may apply to effort expended or to the product of such effort: too tired to do any ~.


labor: applies to physical or intellectual work involving great and often strenuous, onerous and fatiguing exertion: believes the farmers are poorly paid for their ~.     （exertion费力implies laborious and exhausting effort，如a job not requiring much physical exertion一份不费体力的工作）


travail: is a somewhat bookish term for labor involving pain or suffering: years of ~ were lost when the building burned.


toil: implies prolonged and fatiguing labor: his lot would be years of back-breaking ~.       Churchill's "Blood, Toil, Tears, and Sweat" Speech,    丘吉尔演讲：《鲜血辛劳泪水汗水》


drudgery: suggests dull and irksome labor: a job with a good deal of ~.        (irk使难以忍受不耐烦implies difficulty in enduring and impatience,如his chronic tardiness irks his colleagues他总是做事缓慢让同事厌烦)


grind: implies dreary, monotonous labor exhausting to the mind or body: the ~ of performing the play eight times a week.     (dreary无趣monotonous单调)


work劳动: 表示身体思维机器或自然力的活动，还表示努力及其成果，labor费力的劳动: 指费力的劳动，travail苦难、分娩: 书面语，指让人痛苦折磨的劳动，toil辛劳: 指长期费力的劳动，drudgery枯燥的劳动: 表示枯燥让人厌烦的劳动，grind枯燥疲劳的劳动: 指枯燥令人身心俱疲的劳动


记忆方法: 1) 首字母WLTTDG重组成TWGTLD他务工她劳动<==人人劳动

              2) 劳动的意思是需要努力或费力的活动mean activity involving effort or exertion.首字母WLTTDG重组成TWGTLD他务工她劳动<==人人劳动