1. — Unmarried mothers are increasingly common virtually everywhere, reaching as many as a third of all births in the north of Europe, for example.
    ——未婚妈妈越来越常见，几乎到处都有。比如在北欧，未婚生育的孩子占出生率的三分之一。

2. Rescue workers are therefore drilling a hole on the north side of the mine.
    因此，营救人员在矿井的北侧钻了一个洞。

3. Our target area was 250 miles to the north.
    我们的目标区在向北250英里处。

4. It has great gateways which connect the main roads of north China.
    长城有许多关口, 这些关口与华北的主要道路相连.

5. It has great gateways which connect the main roads of north China.
    长城有许多关口, 这些关口与华北的主要道路相连.

6. It has great gateways which connect the main roads of north China.
    长城有许多关口, 这些关口与华北的主要道路相连.

7. In 1929, three years after his flight over the North Pole, the American explorer, R.E. Byrd, successfully flew over the South Pole for the first time.
    美国探险家 R.E. 伯德在飞越北极3年之后，于1929年第一次飞越了南极。

8. It sits on the equator, stretching both north and south about 35 degrees.
    它位于赤道，并向南北各延伸大约三十五度，

9. In spite of my parents' objections, I go back to sleep, and I miss some of the most magnificent scenery on the North American continent.
    尽管我父母反对，我又蒙头大睡，因此我错过了北美大陆上一些最壮观的景色。

10. It is the kind of moment in history when, to summarize in the words of Alfred North Whitehead, familiar patterns fade, familiar solutions fail, and familiar options disappear.
    一个引起恐慌的时刻。我们不妨用阿尔弗雷德·诺思·怀特海德的话来加以归纳: 在历史上的这种时刻，熟悉的模式在消退，熟悉的解决办法在失效，熟悉的选择在消失。