focal point

1.In what sense was the discovery of America a focal point in history?

从什么意义上讲美洲的发现是历史上的一事件呢？

2.Television has now become the focal point of family life in many countries in the world.

现在世界上的许多国家看电视已经成为人们家庭活中的主要消遣。

3.We will have focal point study for moving and fixing grid law etc., have the application to the free surface search of he impressure influent fields.

在数值模拟中点对移动和固定网格法了研究，并应用固定网格法对无压渗流场自由面了搜索计算。