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Which are this: my mother, who is not quite 85, has aortic stenosis, a narrowing of the heart's aortic valve, and her cardiologist has just told her that it's time now to think about open-heart surgery to replace the valve.

正是这一点：我的母亲，还不到85 岁，患有主动脉瓣狭窄，缩小心脏的主动脉瓣，她的心脏病就意味着，是时候做心内直视手术了以取代阀门。

Other conditions that increase the risk of embolism include mitral stenosis (narrowing of a valve in the heart), and endocarditis (swelling of the heart chambers and valves).

其他条件的风险增加栓塞，包括二尖瓣狭窄，以及性心内膜炎（肿胀的心脏，商会和阀门）。

It's revealed that for a realistic system, interference effects are obtained such as the suppression of the central line and inner sidebands and the narrowing of the outer sidebands.

对于一个现实的系统，可以实现干涉效应，诸如中峰和内边峰的抑制、外边峰的窄化。

Hypertopia – a word created from the intersection of two existing words: utopia, the dream of a perfect world and society; and hyperopia, a technical term for the defect of vision that is commonly called near - or short- sightedness, or narrowing of the visual field.

Hypertopia，这个词由两个单词组合而成：utopia――对完美世界和社会的憧憬；hyperopia――远视，一个用于形容视力缺陷上的专业术语，通常与之相对应的为近视。

A further narrowing down of the terminology has been effected by Günther who formulated the term Ars subtilior to designate music of the post-Machaut generation of composers, those musicians of an International Gothic who fused the styles of France and Italy, paving the way for the simpler styles of the 15 th century.

根特尔进一步缩小术语的范围，他使用术语&Ars subtilior&来命名马肖后一代作曲家的音乐并对其进行了系统的阐述。那些融合了法国和意大利风格的具有哥特风格的音乐家们为十五世纪简约风格做了铺垫。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了