Skill comes only with practice, patience, and persistence.

　　只有通過(guò)練習、耐心和堅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)易出現突然的轉向和變化。

　　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，粗糙而布滿(mǎn)老繭。