self-discipline
n[U]
(power of) controlling one's own desires, feelings, etc, usu so as to improve oneself 自律(力); 自我约束(通常指为提高个人修养的)
an athlete's self-discipline 运动员的自律力
Dieting demands self-discipline. 节食需有自我约束力.
and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.