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[求助] 关于晶体方面的--翻译其中一句话

我是单晶方面菜鸟,真心请教:

下文是:acta c 投稿说明中的一段,我没有读懂啊(特别是:黑体的那句话),

2.5. Experimental data
Principal experimental data are extracted from the CIF and are
tabulated under the sub-headings Crystal data, Data collection and
Refinement. Some numerical items may be formatted with a revised
number of decimal places to conform to a consistent style for the
journal. The descriptive text item _publ_section_exptl_prep
should give sufficient information on the compound isolation or
synthesis, crystal preparation (method, solvents and their ratios), and
identification (e.g. melting points and densities), to reproduce the
experiment. Previously reported syntheses, isolation procedures or
spectroscopic data need only be cited. Additional details [e.g. lengthy
synthesis descriptions and long lists of spectroscopic (NMR, IR, etc.)
data] supporting the crystallographic study should be placed in the
_exptl_special_details section of the CIF, which is available from
Crystallography Journals Online.

Spectroscopic data should
be reported in the _publ_section_exptl_prep section only
when assignments are given.
就是这句话!!)

The item _publ_section_exptl_
refinement should be used to provide details of how H atoms were
treated, including the ranges of X—H dimensions and how the values
of Uiso(H) were defined.


请帮我翻译一下,文中黑体的,那句话,是说的什么啊?!
谢谢!!
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