Update README.

Author: cotes2020

README.md

@@ -42,9 +42,9 @@ You will get the following features:
 
 ### Prerequisites
 
-Follow the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installtion of basic environment (Ruby, RubyGem, Bundler and Jekyll). In order to use the script tools to save time, we also need to install [Python](https://www.python.org/downloads/)(version 3.5 or abover) and [ruamel.yaml](https://pypi.org/project/ruamel.yaml/).
+Follow the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installtion of basic environment (`Ruby `, `RubyGems` and `Bundler`). In order to use the script tools to save time, we also need to install [Python](https://www.python.org/downloads/)(version 3.5 or abover) and [ruamel.yaml](https://pypi.org/project/ruamel.yaml/).
 
-In addition, if your machine is running Debian or macOS, make sure you have the [GNU coreutils](https://www.gnu.org/software/coreutils/) installed. Otherwise, get it by:
+In addition, if your machine is running Debian or macOS, make sure the [GNU coreutils](https://www.gnu.org/software/coreutils/) is installed. Otherwise, get it by:
 
 * Debian
 
@@ -225,7 +225,7 @@ The old saying: "Tow heads are better than one. Five heads are better than two."
 
 This theme is mainly built with [Jekyll](https://jekyllrb.com/) ecosystem, [Bootstrap](https://getbootstrap.com/), [Font Awesome](https://fontawesome.com/) and some other wonderful tools(their copyright information can be found in the relevant files).
 
-:tada:Thanks to all the volunteers who contributed to this project, their github ID is on [this list](https://github.com/cotes2020/jekyll-theme-chirpy/graphs/contributors). Also, I won't forget the guys who submitted the issues(or unmerged PR), they reported bugs, shared ideas or inspired me to write more readable documentation.
+:tada:Thanks to all the volunteers who contributed to this project, their GitHub IDs are on [this list](https://github.com/cotes2020/jekyll-theme-chirpy/graphs/contributors). Also, I won't forget those guys who submitted the issues or unmerged PR because they reported bugs, shared ideas or inspired me to write more readable documentation.
 
 
 ## Support