结论剑鞘气管是较重的copd的标志.用英语怎么说？

结论剑鞘气管是较重的copd的标志.

Conclusion Saber sheath trachea is a sign of rather severe COPD.

conclusion

n. 结论，结局，断定，决定，推论；

例句
He said it would not be all that difficult to reach a peaceful conclusion to the conflict.
他说和平解决这一冲突并不会太困难。

saber

--

例句
Like a gryphon puffing flames, crashed through Night's staggered saber - like tusks.
像喷火的怪兽轰鸣着穿过夜阴森交错的白牙.

sheath

n. 护套，鞘，叶鞘，紧身装；v. 包，盖；

例句
Objective : To isolate and culture hair outer root sheath amelanotic melanocyte derived from human scalp.
目的从人头皮毛囊外根鞘分离纯化培养无色素黑素细胞.

trachea

n. 气管，导管，螺旋纹管；

例句
Objective To discuss genesic mechanism of trachea arteria anonyma fistula after tracheotomy.
目的探讨气管切开术后并发气管无名动脉瘘的发生机理.

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

sign

n. 符号，手势，迹象，指示

例句
...a crime wave that shows no sign of abating.
丝毫没有减弱迹象的犯罪势头

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。

rather

adv. 稍微，有点，相当，颇，宁愿，相反地；int. 当然啦，怎么不；

例句
These wines may taste rather hard and somewhat acid.
这些酒可能喝着比较冲并且有股酸味。

severe

adj. 严峻的，严厉的，剧烈的，苛刻的；

例句
He had severe abrasions to his right cheek.
他的右脸颊有严重的擦伤。