dh-1 previously merged and reviewed on webpages (#384)

* Update fluid_cn.rst

1.修改.. py:class::
2.参数粗体化

* Update layers_cn.rst

更改格式

* Update fluid_cn.rst

* Update layers_cn.rst

* Update fluid_cn.rst

* Translation dh 1 modify merged (#8)

* Update fluid_cn.rst

* Update fluid_cn.rst

* Update fluid_cn.rst

* Update fluid_cn.rst

* Update fluid_cn.rst

* Update layers_cn.rst

Author: haowang101779990