painstaking
adj
done with, requiring or taking great care or trouble 极小心的; 辛勤的; 辛苦的
a painstaking job, investigation 艰苦的工作、 调查
painstaking accuracy 高度的精确性
a painstaking student, worker, etc 勤奋的学生、 工人等.
and without giving any consideration to the effects produced on the individuals and on their descendants by the artificial mode of existence imposed by the factory.