Multiple ways 99.9% to solve the problem of garbled code after copying text from PDF

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Need from PDF Copy the text Make notes , But who knows PDF adopt adobe After opening, the copied code is garbled , As shown in the figure below ：
（ Thank you again for guide I sorted it out file ）

solve

Tried Install Fonts , It is a pity that there is no egg .

Method 1-CAJViewer open

Use this software to open and copy , It can be copied perfectly , But there is one A small problem , As described below
“ Compare the consumption of resources ” It's actually a line ,

However, it will be displayed as
“ Compare consumption
Source …”

Method 2-PDF To PPT

step ：（Adobe）

1. Select File
2. export
3. choice PPT

Export to PPT Copy the text again , Pictured ：
But there is also a A small problem , As described below
“ Compare the consumption of resources ” It's actually a line ,

However, it will be displayed as
“ Compare consumption Source …” Line breaks One more space

If there is a better way to solve the problem of garbled code , Hope to point out .