book: revise preface (#197)

Author: rainedoescode

book/en-us/00-preface.md

@@ -10,14 +10,14 @@ order: 0
 
 ## Introduction
 
-C++ user group is fairly large. From the advent of C++98 to the official finalization of C++11, it has accumulated over a decade. C++14/17 is an important complement and optimization for C++11, and C++20 brings this language to the door of modernization. The extended features of all these new standards are given to the C++ language. Infused with new vitality.
-C++ programmers, who are still using **traditional C++** (this book refers to C++98 and its previous C++ standards as traditional C++), may even amazed by the fact that they are not using the same language while reading modern C++ code.
+The C++ programming language owns a fairly large user group. From the advent of C++98 to the official finalization of C++11, it has continued to stay relevant. C++14/17 is an important complement and optimization for C++11, and C++20 brings this language to the door of modernization. The extended features of all these new standards are integrated into the C++ language and infuse it with new vitality.
+C++ programmers who are still using **traditional C++** (this book refers to C++98 and its previous standards as traditional C++) may even amazed by the fact that they are not using the same language while reading modern C++ code.
 
-**Modern C++** (this book refers to C++11/14/17/20) introduces a lot of features into traditional C++, which makes the whole C++ become a language that modernized. Modern C++ not only enhances the usability of the C++ language itself, but the modification of the `auto` keyword semantics gives us more confidence in manipulating extremely complex template types. At the same time, a lot of enhancements have been made to the language runtime. The emergence of Lambda expressions has made C++ have the "closure" feature of "anonymous functions", which is almost in modern programming languages ​​(such as Python, Swift, etc). It has become commonplace, and the emergence of rvalue references has solved the problem of temporary object efficiency that C++ has long been criticized for.
+**Modern C++** (this book refers to C++11/14/17/20) introduces many features into traditional C++ which bring the entire language to a new level of modernization. Modern C++ not only enhances the usability of the C++ language itself, but the modification of the `auto` keyword semantics gives us more confidence in manipulating extremely complex template types. At the same time, a lot of enhancements have been made to the language runtime. The emergence of Lambda expressions has given C++ the "closure" feature of "anonymous functions", which are  in almost all modern programming languages ​​(such as Python, Swift, etc). It has become commonplace, and the emergence of rvalue references has solved the problem of temporary object efficiency that C++ has long been criticized for.
 
 C++17 is the direction that has been promoted by the C++ community in the past three years. It also points out an important development direction of **modern C++** programming. Although it does not appear as much as C++11, it contains a large number of small and beautiful languages ​​and features (such as structured binding), and the appearance of these features once again corrects our programming paradigm in C++.
 
-Modern C++ also adds a lot of tools and methods to its standard library, such as `std::thread` at the level of the language itself, which supports concurrent programming and no longer depends on the underlying system on different platforms. The API implements cross-platform support at the language level; `std::regex` provides full regular expression support and more. C++98 has been proven to be a very successful "paradigm", and the emergence of modern C++ further promotes this paradigm, making C++ a better language for system programming and library development. Concepts verify the compile-time of template parameters, further enhancing the usability of the language.
+Modern C++ also adds a lot of tools and methods to its standard library such as `std::thread` at the level of the language itself, which supports concurrent programming and no longer depends on the underlying system on different platforms. The API implements cross-platform support at the language level; `std::regex` provides full regular expression support and more. C++98 has been proven to be a very successful "paradigm", and the emergence of modern C++ further promotes this paradigm, making C++ a better language for system programming and library development. Concepts verify the compile-time of template parameters, further enhancing the usability of the language.
 
 In conclusion, as an advocate and practitioner of C++, we always maintain an open mind to accept new things, and we can promote the development of C++ faster, making this old and novel language more vibrant.
 
@@ -30,7 +30,7 @@ In conclusion, as an advocate and practitioner of C++, we always maintain an ope
 ## Purpose
 
 The book claims "On the Fly". It intends to provide a comprehensive introduction to the relevant features regarding modern C++ (before the 2020s).
-Readers can choose interesting content according to the following table of content to learn and quickly familiarize the new features you would like to learn.
+Readers can choose interesting content according to the following table of contents to learn and quickly familiarize themselves with the new features that are available.
 Readers should aware that all of these features are not required. It should be learned when you need it.
 
 At the same time, instead of grammar-only, the book introduces the historical background as simple as possible of its technical requirements, which provides great help in understanding why these features come out.