The other persons..not being very perfect in their duties.
出自: W. WhewellStokharin has perfected a painless death by poison.
出自: G. VidalHe had..the opportunity and resources to perfect his prowess.
出自: A. EdenThe power-based society of the Westerner..ever concerned with perfecting their technological know-how.
出自: S. BikoG. M. Trevelyan on Lady Jane Grey:As learned as any of the Tudor sovereigns,this gentle Grecian had a more perfect character than the best of them.
G.M.特里威廉在《Lady Jane Grey》中写道:在认识到都铎王朝的所有君主之后,优雅的Grecian比其他人具有更加完美的品质。
He tries to prefect his English.
他尽力使完美自己的英语水平。
He tries to perfect her English.
前后主语不一致,不能清楚表达句子的意思,应该改为He tries to help her to perfect her English.