We took special care to follow a progressive approach, in which we introduce concepts and ideas gradually: however we made sure that every single step is useful for solving a real-life problem.

我们特别采取了渐进的方式，逐渐地引入一些概念与思想：然而，我们仍然能够确定其中的每一步骤都有助于解决真实的问题。

youdao

We took special care to follow a progressive approach, in which we introduce concepts and ideas gradually: however we made sure that every single step is useful for solving a real-life problem.

我们特别采取了渐进的方式，逐渐地引入一些概念与思想：然而，我们仍然能够确定其中的每一步骤都有助于解决真实的问题。

youdao