问题: 请帮翻译！
1，世界和平是他愿意为之奋斗的理想。
2，他全身心地致力于表年人的教育事业。
3，这位老人很感谢我陪了他三个小时。
解答:
1. He is willing to dedicate himself to the ideal of world peace.
2. He thoroughly devotes himself to the education for senior citizens.
3. The old man was grateful that I had accompanied him for three hours.
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