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例句：
Skill comes only with practice, patience, and persistence.
只有通过练习、耐心和坚持不懈才能获得技能。
In practice, however, such an attitude is counterproductive.
然而在实际中，这种态度会适得其反。
Educational practice is liable to sudden swings and changes.
教育实践活动易出现突然的转向和变化。