早期胶卷相机使用者对夜间摄影避而远之，原因在于，或者是合适景深所需的长时间曝光无法达到，或者是产生太多噪点。
Early film photographers shied away from capturing night scenes because these require prohibitively long exposures to maintain adequate depth of field, or produced unacceptable amounts of image noise.
这样的话，可以通过后期处理减弱曝光度，同时因为相机感光较多，可以把噪点限制到最少。
This way the exposure can always be decreased afterwards — while still maintaining minimal image noise because more light was collected at the digital sensor.
你必须在景深、曝光时间和噪点之间做出权衡。
Photos are unavoidably limited by the trade-off between depth of field, exposure time and image noise.
这位时尚“毒舌”对刚回归单身的布兰妮和豪门女星希尔顿给出了这样的评价：“活像过度曝光豆荚里的两颗豌豆！ 没有一点风格，毫无时尚感可言！”
The poison-penned arbiter of style described newly single Spears and celebrity socialite Hilton as "two peas in an over-exposed pod! Style-free and fashion deprived."
这张照片包含曝光44次的太阳和一幢房子的照片，都摄于同一地点，也都在胶卷的一幅画面上。
The shot includes 44 exposures of the sun and a picture of a house, all taken from the same location and all on a single frame of film.
相机的测光方式要设置在局部测光或点测光方式，测光点对着你想要锁定曝光值的目标，按下锁定钮。
To make this work, use the partial metering mode (or spot metering mode) over the subject where you want to lock the flash output then press the asterisk (*) button.
准确的曝光控制也非常重要，要做到这一点，摄影师依靠的是曝光直方图。
Absolute exposure control is crucial, and to get it, the photographers relied on exposure histograms.
由于政客们有时易于表现出过于刚愎自用或专横跋扈，因此，滑稽场面就成了最有效的传播媒介，它可以把问题、关注点直接曝光给普通公众。
With politicians tending to become too egotistical or overbearing at times, comedy has been the most effective vehicle that indirectly exposes issues and concerns to the general public.
尽管由于曝光过度产生了一点小小的粉红区域，但整张照片依然清晰无比的记录了让人惊叹不已的日冕现象。
Even though there are small pink areas resulting from over-exposure, the result is still the clearest picture yet of this extraordinary phenomenon.
这点带给我们新的原则：比以前少一点曝光。
This brings us to the truly new principle: embracing much more openness than ever before.
这样会增加图像的噪点，但最好还是尝试一下，因为长时间曝光会产生令人讨厌的，明亮的彩色噪点。
You're going to get some noise, but it's best to try and avoid the obnoxious, brightly-colored pixel noise often associated with digital cameras and extremely long exposures.
绝大多数的数码相机都能曝光30秒而不会产生过多的噪点，这是一个很好的起点，这个曝光时间也可以避免拍下星星因地球自转产生的轨迹。
Most digital cameras can easily a handle a 30-second exposure before noise starts getting out of hand. That's a great place to start.
一个人能够非常仔细地研究这一点，近距离地分析，寻找自己和社会失序的原因，把它们曝光，相信或许如此他就能把心智从中解脱出来。
One can examine all this very carefully, analyse it closely, look for causes of disorder in oneself and in society, expose them to the light and perhaps believe that one will free the mind from them.
目的：探讨腹部摄影自动曝光控制探测点组合选择。
Objective:Investigate the component pattern of detecting points in automatic expo-sure control of abdomen radiography.
结果直接成像系统具有曝光剂量小、图像质量佳等饰点，其甲级片率达到91.3%。
Resu lts The direct digital imaging system had the advantages of low exposure dose and good image quality. The first film rate was 91.3%.
但是目前国内广泛使用的X射线机的点片曝光装置还存在自动化程度低、控制精度差、曝光精度低以及体积大等缺点。
However, the film exposure device of the currently widespread-used X-ray machine has poor quality of image, a low level of automation, poor precision controlled and film exposure and large size.
这些俱乐部相信，它们能够通过品牌专卖和相关销售，将免费转播带来的曝光率转化为收入。但知名度较低的球队做不到这一点。
These clubs believe they can translate the exposure from free-to-air broadcasts into revenues through merchandising and related sales, something the little known teams cannot do.
我看到更多的曝光时间根据交通好一点。
I've increased the exposure time to see the light transport a bit better.
地理纬度：其下限暴露在交叉点的两曲线，与一个曝光时间15个单位为下面的例子。
Exposure latitude: its lower limit is at the intersection point of the two curves, with an exposure time of 15 units for the example below.
要想丑闻完全的曝光，需要的只是一个偶然的转折点。
For a scandal to really blow up, all it needs is an unexpected turn.
要想丑闻完全的曝光，需要的只是一个偶然的转折点。
For a scandal to really blow up, all it needs is an unexpected turn.
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