Maintaining a white finish over a length of time would present its own problems as a paint finish on such an exposed part of the house could require regular maintenance with difficult access.
况且，要它长时间的保持白色外观本身就会产生一些问题，因为在这块房屋外露的部分进行油漆粉刷是很难进行定期的维护保养的。
Boys exposed to high levels tend to have a longer ring finger relative to their index finger, while in males exposed to lower levels, the two fingers tend to be a similar length.
暴露在高水平性激素环境里的男孩，其无名指相对于他们的食指更长，而低水平环境中，这两根手指趋近于等长。
Please note that both exposed filament length and marker length can easily be varied to suit your custom requirements.
请注意暴露再外面的细丝长度何标记长度可以根据习惯要求来改变。
Results: The length of lumbosacral nerve roots in epidural space is short and extremely difficult to be exposed.
结果：腰骶部脊神经根在硬膜外间隙长度短，且显露困难。
"This suggests the timing of the exposure to BPA and perhaps the quantity and length of time we are exposed to BPA may be affecting the immune system response," Rees Clayton said.
“这提示BPA暴露的时段、可能的暴露强度和暴露持续时间可能影响免疫系统的反应”ReesClayton说。
"We don't know the dose of photosynthesizer needed, the proper wavelength of light, the amount of area to be exposed, or the length of light exposure, " he said.
他说“我们不知道光照量，合适的波长，照射面积，或者光照时间长短”。
"We don't know the dose of photosynthesizer needed, the proper wavelength of light, the amount of area to be exposed, or the length of light exposure, " he said.
他说“我们不知道光照量，合适的波长，照射面积，或者光照时间长短”。
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