Skill comes only with practice, patience, and persistence.

　　只有通過練習(xí)、耐心和堅(jiān)持不懈才能獲得技能。

　　In practice, however, such an attitude is counterproductive.

　　然而在實(shí)際中，這種態(tài)度會(huì)適得其反。

　　Educational practice is liable to sudden swings and changes.

　　教育實(shí)踐活動(dòng)易出現(xiàn)突然的轉(zhuǎn)向和變化。

　　His hands were rough and callused, from years of karate practice.

　　他的`雙手由于多年的空手道練習(xí)，粗糙而布滿老繭。