1. Phase III, from March 1991 to March 1993, focused on the refinement and institutionalization of these activities. 从1991年3月到1993年3月,第三阶段的重点是对这些活动做精细的改进并且使其制度化。
2. This particular model has a further refinement. 这一款式又有了进一步的改进。
3. The new plan is a refinement of the one before. 新计划比原计划有改进。
4. As long as you understand that any potential benefit is modest and subject to further refinement, taking a daily multivitamin makes a lot of sense. 只要你明白任何潜在的益处都是适度的,而且还有待进一步完善,每天服用多种维生素就很有意义。