With today's more efficient contraception women can plan their families and careers.

有了当今更为高效的避孕方法妇女们能够规划好自己的家庭和事业。

How can we be more efficient?

我们怎么才能更有效率呢？

Now your brain's job is to make that map more efficient.

现在，你大脑的工作就是让地图更有效。

In fact, "becoming more efficient" is part of the problem.

事实上，“变得更有效率”是问题的一部分。

Necessity will force the swift adoption of more efficient ones.

需求将迫使我们迅速采取更有效的措施。