AA:drill bit prodution costs..the author's argument is trying to advise reducing total production costs..the only way is to reduce indivisual production costs and to attain big profit..because Chinliville's(a factory of the company) production is 10 per dollar,the most production rate of the other factories of the company is 7 per dollar..(是不是per dollar就记不清了)... AI:失忆中..这个竟然失忆了..哎...洗澡的时候想到了..whether one should disobey the laws when he or she feels unjust.