However, the emergence of the Flex platform - a free, open source framework for producing Flash applications - brings us further into the application development arena.

但是，Flex平台—生成flash应用程序的免费开源框架—的出现将我们进一步引入应用程序开发的竞技场。

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If you bounce the flash off a wall to the side of you, or behind you, then the source of light relative to the subject, is much larger than if you had shot with the flash straight on.

如果你把闪光灯打到你旁边或身后的墙上，相对于拍摄主体来说，此时的光源面积要比直接将闪灯打到主体上要大的多。

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The measuring method and principle of efficient intensity of flash source are described, and a flash efficient intensity tester is introduced in detail.

论述闪光光源有效光强的测量方法及原理，并详细介绍我所自行研制的闪光有效光强测定仪。

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