update README.md

blaisewang · Apr 24, 2020 · 2c31f33 · 2c31f33
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diff --git a/README-ZH.md b/README-ZH.md
@@ -61,7 +61,7 @@ Linux 用户可以通过在应用内任意位置右键单击的方式打开 `Pre
 ```
 
 使用操作系统默认的方式（或者其他工具）对公式或文本进行截取（macOS 默认为 Shift (⇧)-Control (⌃)-Command (⌘)-4）后，
-按下 `空格` 键 （或 `退格` 键）预览截图，或者直接按下 `回车` 键发送 OCR 请求。
+按下 `空格` 键预览截图，或者直接按下 `回车` 键发送 OCR 请求。
 
 查看下面的[展示](#展示)章节了解使用流程。
 

diff --git a/README.md b/README.md
@@ -62,7 +62,7 @@ Run `Image2LaTeX` at `Image2LaTeX-linux/bin/` or with:
 
 Use your operating system's default methods (or other tools) to take a screenshot of equations or text (Shift (⇧)-Control (⌃)-Command (⌘)-4 on macOS by default).
 
-Then, press the `Space` key (or `Backspace` key) to preview the screenshot.
+Then, press the `Space` key to preview the screenshot.
 Or, press the `Return` or `Enter` key to send the OCR request directly.
 
 See [demo](#Demo) section below.