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1·The ball curved through the air.

球在空中沿曲线运动。《牛津词典》

2·The ball curved strangely in the air.

球在空中划出奇怪的弧线。《柯林斯英汉双解大词典》

3·The ball looped high up in the air.

球高高飞起，在空中画了一条弧线。《牛津词典》

4·In 'He grabbed the ball and threw it in the air', 'ball' is the antecedent of 'it'.

在He grabbed the ball and threw it in the air一句中，ball是it的先行词。《牛津词典》

5·Stories were like air to me and while other kids played ball or went to parties, I lived out adventures through the books I checked out from the library.

故事对我来说就像空气一样，当别的孩子打球或参加聚会的时候，我却通过从图书馆借来的书，过着冒险般的生活。

6·As his sadness turned to anger, he kicked his new soccer ball into the air.

他的悲伤变成愤怒，他把他的新足球踢向了空中。

7·It can inflate (使膨胀) itself with water and air to turn into a ball several times of its real size.

河豚可以利用水和空气使自己膨胀，变成一个等于其数倍实际大小的球。

8·The ball is fully swelled with air.

这球已打足了气。《新英汉大辞典》

9·Of course, in reality, the baseball player knows better They give effect to the ball, they deal with air drag they spin the ball, and then these equations are not valid.

当然，还是棒球选手更了解现实情况,他们用特殊的抛球方式减小空气阻力,他们使球在飞行时带自转，这些公式就无法应用了。

10·All the gravity of all the mass in the cosmos should have been pulling the universe back inward, just as gravity pulls a ball back down to Earth after it's been thrown into the air.

宇宙中每一物体的每个引力都会对宇宙产生一个指向物体本身的拉力，就像在重力作用下，抛向空中的球会被拉回地面。