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.
如果你嘱不准曝光时间，最好查一下曝光表。
You'd better consult the exposure meter if you be not sure of the time for exposure.
如果你拿不准曝光时间，最好查一下曝光表。
You'd better consult the exposure meter if you are not sure of the time for exposure.
如果你吃不准曝光时间，最好查一下曝光表。
You'd better consult the exposure meter if you're not sure of the time for exposure.
这意味着，即使在光线并不足的条件下，曝光时间仍然可以极短。
This means that exposure time can be extremely short even in poorly lit conditions.
此人看不清，还稍微有些抖（应该是由于长曝光时间引起）。
The man is not clear and is slightly blurred (no doubt due to the long exposure required).
度过由快门速度设置的曝光时间后，后幕帘落下闭合，曝光停止。
After a period determined by the set shutter speed, the rear curtain now drops to close the camera to light and end the exposure.
它并不是，并不是一个瞬间的，它本身可以是五分钟的曝光时间。
It's not a, it's not an instant, per se, it could be five minutes of exposure.
为了研究冲击问题，需要很短的曝光时间和较高的画幅移动速率。
For the study of impact problems, very short exposure times and high picture repetition rates are required.
仅改变曝光时间，保持相机的其它参数不变，建立了曝光标定原理。
The principle of exposure duration calibration is formed by adjusting exposure duration and keeping other parameters of digital color camera.
在曝光时你要照顾到闪电和前后景，周边的光线会限制你的曝光时间。
You will be exposing both the lightning and the foreground and background when you are taking these pictures. The ambient light will determine your exposure time.
满月可以帮你减少曝光时间、扩大景深，而月光暗淡的夜晚增加了星星的可见度。
A full moon can be a savior for reducing the required exposure time and allowing for extended depth of field, while a moonless night greatly increases star visibility.
使用CT的激发扫描功能控制曝光时间能得到更准确的肝动脉期时间。
Using ct arouse scanning function control exposure time can get more accurate liver artery issue time.
PS版晒版时，需要控制的时间主要有抽真空时间、曝光时间和显影时间。
When proofing plates, is need to control the vacuum time, exposure time and developing time of PS version.
覆盖防氧膜、添加活性稀释性单体及延长曝光时间有利于其光交联反应的进行。
It is shown that overlaying oxygen barrier layer, appending active diluent monomer and prolonging exposure time are in favor of the photopolymerization of the product.
前者可延长曝光时间来消除，后者可通过高填充因子和放大滤波电路予以有效抑制。
The former can be eliminated by prolonging exposure time and the latter can be inhibited effectively by selecting higher fill factor and adopting amplifying and filtering circuits.
生活中的你是不是对世界也保持着疏离的观察，比如叼根烟、不带评价地等曝光时间过去？
Are you used to observing the world with distance in your life, like lighting a cigarette during the time of exposure without any personal comment.
用激光回波脉冲控制电子快门来操纵摄像机的曝光时间，是抑制背景噪声的一种有效方法。
Steering exposure time of a camera through control electron shutter with laser echo pulse is an effective method for inhibiting background noise.
桑德善于使用大幅照相机与镜头，且具有更加长的曝光时间，这样他就可以聚焦于拍摄对象的细节部分。
Sander favoured large-format cameras with lengthy exposure times so he could focus on detail.
小(有时候称“快”)焦比的望远镜确实能够在底片上呈现出更亮的图像，因此需要的曝光时间可以更短。
Telescopes with small (sometimes called "fast") focal ratios do, however, produce brighter images of extended objects on film, and thus require shorter exposure times.
它的大光圈镜头可以摄入尽可能大的光量，所用技术并不需要笨重的自动对焦系统，曝光时间也是自动调节。
It has a wide-aperture lens to capture as much light as possible, and the technology requires no clunky auto-focus mechanism. It adjusts exposure time automatically.
你就会很快发现你的拍摄是曝光过少还是过多，曝光时间是否够长到让车辆以你希望的方式驶过相框。
You'll quickly realize whether your shots are under or overexposed and whether the length of the exposure is long enough to let cars travel through the frame in the way that you want.
比较两组介入治疗时平均X线曝光时间、造影剂用量、术后TIMI血流分级和心电图ST段变化。
The time of X-ray exposure, the amount of contrast media consumed, the TIMI grading after stenting and ST-segment changes of electrocardiogram were compared between two groups.
目的：通过测试数字成像设备的X线机管电压和曝光时间稳定性，探讨数字成像摄影条件的选择原则。
Objective:To obtain suitable digital radiologic exposure factors of CR and DR by measuring stability of their X-ray tube voltage and exposure time.
通常，你可以用大点的光圈测光(这样，测量的曝光时间就在30秒以内)，随后缩小光圈，相应地增加曝光时间。
Usually one can first meter using a larger aperture (so that the metered exposure time is under 30 seconds), then stop down as necessary and multiply the exposure time accordingly.
通常，你可以用大点的光圈测光(这样，测量的曝光时间就在30秒以内)，随后缩小光圈，相应地增加曝光时间。
Usually one can first meter using a larger aperture (so that the metered exposure time is under 30 seconds), then stop down as necessary and multiply the exposure time accordingly.
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