但是，相比电池，电容器储存的能量不足以维持任何比闪光时间长的时间，而闪光时间还不足一秒。

However, in contrast to batteries, a capacitor cannot store enough energy to power anything that lasts longer than a flash — some fraction of a second.

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然后你有大约16秒时间重新构图进行拍摄，闪光灯的曝光量将保持在锁定值，不会因重新构图后曝光量改变而破坏拍摄结果。

You then have about 16 seconds to recompose and take the shot thereby guaranteeing the exposure you set and not have the camera reset a new exposure ruining your shot.

youdao

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 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.

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