求翻译：读书和自学对提高英语有帮助。但书的缺点，和自学一样，没有反馈，没有双向的交流。理论上知道的事，实际做起来是不一样的。尤其是语言，遵循“用进废退”的原理。掌握这部分的最有效方法是：创造条件和机会，多交流。是什么意思？

To improve English reading and self-help. But the book's shortcomings, and self, there is no feedback, no two-way communication. Know things in theory, but in practice it is not the same. Particular language, follow the "use and disuse" principle. To master this part of the most effective way: to cr