The causes of these disorders are unknown, and both are considered orphan diseases because they each affect less than 200,000 people in the United States.
由于这两种疾病在美国的患病人群均少于20万，因此都被认为是罕见病。
However, far less has been known about how meal timing and exercise might affect general health.
然而，对于进餐时间和运动如何影响整体健康，人们所知甚少。
But what is less often remarked on is that the plants themselves affect the nature and severity of fire.
但人们不那么注意的是，正是这些植物自身影响了自然和火灾的猛烈程度。
The trains are likely to have between 650 and 1200 seats; the use of small trains with higher frequency or larger trains operating less frequently could well affect passenger Numbers.
高速列车座位数在650到1200座不等，列车根据载客量多少运行(载客量较少的列车发车间隔较短，载客量较大的列车发车间隔较长)可有效影响客流量。
This doesn't affect the file size as much but requires less memory for the user agent to decompress the image into a pixel map.
这虽然不大会增加文件大小但对于用户代理来说它需要更少的内存来把图片解压为像素地图。
Having a few regular stress relieving habits in your life can make your stressors affect you less, and can provide you with a means of coping in a healthy way when stress does get you down.
当您在生活中培养一些有规律的减压习惯时压力对您的影响就会减小，同时当压力把您击倒时您也拥有一个健康的生活方式。
Movies and television affect our daily behaviors, making us less active.
电影与电视影响我们的日常行为方式，使我们变得慵懒。
Slouching not only makes you look less attractive, it can also affect your health.
没精打采不仅使你看起来缺乏吸引力，而且影响你的健康。
These can certainly affect your life-it's hard to get into grad school, or to get a work visa in the US, without an undergraduate degree-but tests like this will matter less and less.
它们肯定能够影响你的人生——没有本科学位，你很难申请研究生院入学，或者得到一张美国的工作签证——但是这种衡量标准的重要性将变得越来越小。
When you work closely with others who are less fortunate than you, or when you set a local goal and work to accomplish it, you see directly how your actions can affect the world around you.
当你同那些没有你那么幸运的人们密切合作的时候，或者当你制定一个要在本地实施的目标并努力去完成的时候，你会直接地感受到你的行为对周围世界产生的影响。
Now according to Kendler, this change will affect a small number of people - less than 30 percent of the bereaved.
据肯德勒推测，这一改变将会影响一小部分人群——不超过30%经历悲痛的人。
The second is that the real power of the office to affect, let alone control, events is far less than imagined.
其次，这间办公室能给你的，那种可以对事态产生影响的真正实权，(且不说控制事态)，比想象中的要小很多。
Two decades ago, it was considered to be non-existent. Then studies found that changes in property values did affect spending, but by less than changes in share prices did.
二十年前人们还认为不存在房产财富效应，后来虽然有研究发现了房产价值变动对消费支出的影响，但比股价变动而产生的影响要小得多。
Few of those left behind are home alone - most are left in the custody of grandparents - but the separation from their parents will inevitably affect their development in less-than-positive ways.
除了极少数独守家中，大部分留守儿童有他们的祖父母监护，但是远离父母仍将不可避免地对他们的成长产生诸多消极的影响。
An aging society also may affect elections, although that is less clear.
一个老龄化的社会还可能影响选举，尽管这还不是一目了然。
For most people, 10 mg isn't nearly enough to affect mood or behavior — much less keep them awake.
对于大多数人来说，10毫克还不足以引起情绪和行为的波动，更别提让人失眠了。
Zoom enlarges or shrinks the display to show more or less of your document. It does not affect printing.
缩放功能可以放大或缩小画面，以显示较多或较少的文档内容。它不影响打印效果。
In theory regulation rearranges the distribution of economic output, away from the newly regulated activity towards less regulated ones, but does not affect its overall volume.
理论上，规则会经济产出的分布进行重新排序，避开新规范活动，朝向那些较少的管制，但不会影响其总量。
Zoom enlarges or shrinks the view to show more or less of your document. It does not affect printing.
缩放功能会放大或缩小视图，以显示较多或较少的文档内容。打印不受影响。
Hepatology Digest: Your previous research showed that minor ribavirin dose reductions to manage adverse events to not appear to adversely affect SVR unless cumulative exposure is less than 60%.
《国际肝病》：您以前的研究表明，利巴韦林用量的微小减少不会明显影响持续病毒应答率，除非剂量累计减少60%以上。
In contrast, we realise we have no control over external distractions like road works and so they affect us less.
相反，我们觉得自己无法控制诸如道路施工等让人分心的情况，所以这些情况对我们影响不大。
Although the glass shape did not affect the concentration of ethanol vapor, the temperature did, with chilled champagne releasing less ethanol, but the same amount of carbon dioxide.
虽然酒杯的形状并不影响乙醇蒸气的浓度，但对于释放少量乙醇的冰镇香槟而言，酒杯形状却能对相同数量的二氧化碳产生影响。
When it comes to security, "you could use a Mac instead of a PC," he said, arguing that viruses are less likely to affect Mac users.
当论及系统安全时，他说：“应该用Mac系统，而不是PC机。”原因在于病毒不太可能攻击Mac用户。
This will affect about 14% of workers nationwide and 20% in the less productive former East Germany, according to a study by three economists at universities in Magdeburg, Berlin and Dresden.
根据一项来自马格德堡，柏林和德累斯顿大学的三位经济学家的调查发现，这将影响到全国范围内14%左右的工人和生产力较低的前东德的20%。
Crohn's disease is much less common but can be accompanied by more severe symptoms as it can affect the whole gastrointestinal tract.
虽然克罗恩病比乳糜泻少见，但是克罗恩病有更严重的症状，因为它可以影响整个消化道。
Crohn's disease is much less common but can be accompanied by more severe symptoms as it can affect the whole gastrointestinal tract.
虽然克罗恩病比乳糜泻少见，但是克罗恩病有更严重的症状，因为它可以影响整个消化道。
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