assiduous:刻苦的;勤奋的
diligent:勤勉的,勤奋的
industrious:勤劳的,勤奋的
laborious:辛勤的,努力的
indefatigable:不倦的;坚持不懈的
operose:勤勉的,用功的
sedulous:勤勉的,刻苦的
painstaking:勤恳的,刻苦的
strenuous:发奋的,努力工作的
arduous:努力的,使劲的
relentless:不间断的
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