The speedlight will pre-flash that area and lock that exposure into memory. I might caution you that you have 16 seconds to then recompose and take the shot.
闪光灯会预闪并把曝光值记忆下来，注意你只有16秒的时间重新构图拍摄。
The flash power calculation is also based on centre-weighted metering of the light reflected by the pre-flash.
闪光灯输出功率的计算仍然是根据预闪反射光的中心加权测量结果。
So, we've had a Nexus One running pre-release versions of Flash 10.1 and Froyo 2.2 for a couple of days.
我们在一台Nexus One上运行预发行版本的Flash 10.1和Froyo 2.2系统已有数天了。
Pre-rendering logic, where Flash Player attempts to determine whether the GUI needs to be updated because of data value changes.
预渲染逻辑，其中FlashPlayer试图确定是否因数据值变更而更新gui。
In the pre-forming die, a resistance wall was adopted to build the flash groove and a convex web structure was used to connect the great varying cross-sections.
在该预锻模中，采用阻力墙形式构造飞边槽，采用凸形连皮结构连接多个大变截面。
In the pre-forming die, a resistance wall was adopted to build the flash groove and a convex web structure was used to connect the great varying cross-sections.
在该预锻模中，采用阻力墙形式构造飞边槽，采用凸形连皮结构连接多个大变截面。
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