1. During the seventeenth and eighteenth centuries, the entire site became covered with a layer of hard grey clay, which minimised further erosion. 在十七世纪和十八世纪，整个遗址被一层坚硬的灰色粘土覆盖，这极大减少了进一步的侵蚀。
2. She gave birth to Annabel just after her seventeenth birthday. 她刚过完17岁生日就生下了安娜贝尔。
3. It was the seventeenth century before Newton determined the freezing point of water. 那是17世纪，牛顿确定水的凝固点之前。
4. Thomas Sawyer, where were you on the seventeenth of June, about the hour of midnight? 托马斯·索亚，6月17日大约半夜时分，你在什么地方？
5. Agriculture and fishing formed the primary sector of the economy in the Netherlands in the seventeenth century. 农业和渔业是17世纪荷兰经济的主要部分。
