Farming produced more food per person than hunting and gathering, so people were able to raise more children. And, as more children were born, more food was needed (need). Agriculture gave people their first experience of the power of technology to change (change) lives.
参考译文：农业比狩猎和采集为每人生产更多的食物，所以人们能够养育更多的孩子。而且随着更多的孩子的出生，人们需要更多的食物。农业让人们第一次体验到技术能够改变生活的力量。
备注(1):以上to change lives为不定式作后置定语修饰名词the power of technology.
Agriculture gave people their first experience of the power of technology to change (change) lives.
参考译文：农业让人们第一次体验到技术能够改变生活的力量。
备注(2):以上作后置定语的不定式to change lives不能改为现在分词changing lives作后置定语。
