[ZH] Fixing 13-3.

[JonathanSum]

#618

This Pull request should be closed. I tried to fix the issue for #618
by replacing the latex form the English file. But it looks like the GitHub thinks the latex is the same as the English version. I added a space to make GitHub thinks they are different. If after pulling this requestion and shows the issue is not fixed. It means the issue is not in the translated Chinese file.

[Atcold]

What am I supposed to do with this PR?

[JonathanSum]

I guess the reason why the latex is broke is the front type:

It is either the first one is from the English version or the Chinese version, but you can see they are different.

$\lbrace\boldsymbol{x}{i}\rbrace^{t}{i=1}$
$\lbrace\boldsymbol{x}{i}\rbrace^{t}{i=1}$

$\boldsymbol{h}$
$\boldsymbol{h}$

$\boldsymbol{X}\boldsymbol{a}$
$\boldsymbol{X}\boldsymbol{a}$

$\boldsymbol{a}$
$\boldsymbol{a}$

$\boldsymbol{x}{i}$
$\boldsymbol{x}{i}$

If after you merged it and the latex issue remains, I don't know what to do.

[JonathanSum]

I will follow this pull request as a guideline to fix it.
#576

[JonathanSum]

I have added little changes in the Chinese translation to improve its translation, but the Latex is still the same as the English one.
I will test it on Sunday or Monday.

[JonathanSum]

Updated: I have improved a little bit on Chinese translation.
But the latex is not fixed yet. I will pick another day to find a way to fix them.

Please feel free to pull this one only for a translation update.

[Atcold]

Thanks.
I can try to help fixing the LaTeX next week.