practice后面加什么词性?

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。

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

他的`双手由于多年的空手道练习，粗糙而布满老茧。