1. Both men had just begun to swim towards the shore, when they noticed with dismay that the speedboat was moving in a circle.
    两个人刚开始向岸边游去，就突然惊愕地发现快艇正在转着圈行驶，

2. When that side of the moon on which the sun is shining is facing us, we see a round shining circle — a full moon.
    当月亮接受阳光照射的一面面向我们时，我们看到的是个发亮的圆盘——满月。

3. They had just had enough time to swim out of danger when the boat again completed a circle.
    他们刚刚来得及游出危险区，快艇就又转完了一圈。

4. The pilot managed to circle the balloon for some time.
    飞行员设法绕着气球飞了一阵。

5. Then we see just half of the circle shining.
    那么，我们只看到圆月一半发亮，

6. A polar bear has a preference for cold weather.
    北极熊喜欢寒冷的天气。

7. A polar bear has a preference for cold weather.
    北极熊喜欢寒冷的天气。

8. At once the villagers formed a circle and started moving around me, dancing and singing to the music from a kora.
    村民们立即围成一个圆圈，在我的周围转了起来，随着科拉琴的伴奏跳舞唱歌。

9. So one´s circle of friends grows.
    朋友的圈子就这样不断扩大。

10. She then said, holding up first a square, a triangle, and then a circle.
    她问，先举起一个正方形，然后是一个三角形，接着是个圆形。