1. These small square stones became a problem for the building and continued to fall off the face for 40 years until a major renovation was undertaken. 这些方形的小石板成了大楼的问题，四十年来不断从外墙脱落，直到一项重大的翻新工程开始进行。
2. The investigation was undertaken primarily to mollify pressure groups. 展开该调查的目的主要是为了安抚那些压力集团。
3. The UN has undertaken to reinforce its military presence along the borders. 联合国已经着手增援其驻扎在边境的军事力量。
4. Miranda has undertaken a review of all of them. 米兰达对所有这些都进行了审查。
5. Process praise is acknowledgement of the efforts the person has just undertaken. 对过程的表扬是对一个人所做努力的肯定。
