Its IR spectrum compared with that of comphor nitrimine.是什么意思？

Its IR spectrum compared with that of comphor nitrimine.

它的红外光谱与樟脑硝亚胺红外光谱相似.

its

pron. (it的所有格形式)它的，厥；

例句
The government is to accelerate its privatisation programme.
政府将加快其私有化计划的进程。

ir

abbr. Iran 伊朗，Infra-red 红外线；pref. 表否定；

例句
At last, some propositions for designing monolithic ferroelectric thin film IR - FPA are also presented.
最后, 对设计和研制单片式铁电薄膜IR-FPA器件提出了一些看法和建议.

spectrum

n. 光谱，波谱，范围，系列；

例句
Households accumulate wealth across a broad spectrum of assets...
家庭在以各种各样的资产形式积累财富。

compared

adj. 比较的，对照的；

例句
He compared the achievements of the British and the French during 1916 and concluded that the latter were better all around.
他比较了1916年英国人和法国人的成就，结论是法国人在各方面都做得更好。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。