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- 只有当演员把台词背得滚瓜烂熟时，我们排戏才会有成效。
Only when the actors have their lines(down) pat can we practice the play effectively.
- 无结果的，无成效的不产生商品或有用结果的
Not productive of a good or useful result.
- 这所学校保证立见成效。
The school promised rapid results.
- 他们提高生产力的措施卓有成效。
Their efforts to improve the production have been very effective.
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