1. 铁石心肠 　英文译文：___________________.

2. 置死地于后生 　英文译文：___________________.

3. 千秋功业 　英文译文：___________________.

4. 安居乐业 　英文译文：___________________.

5. 骨肉分离 　英文译文：___________________.

答案：

1. cruel and unrelenting

2. a vigorous and manly exertion

3. a great undertaking of lasting importance

4. live in peace and work happily

5. family separation