DSLR在影片拍摄的优势除了镜头选择很有弹性外，其景深 (depth-of-view) 效果更是非一般数码摄录机 (DV)所能 做到，且不难摄录得到高质素及具电影感的拍摄
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So, in Elaboration, the breadth view of the requirements (the vision) is expected to be unstable, changing as the depth view is understood and executables are created.
所以，在细化阶段，需求的宽度视角(远景)是不稳定的，会随着对深度视角的理解和可执行性的生成而变化。
Our view is that the depth and length of the current recession relative to previous recessions is closely linked to the tremendous rise in household debt that preceded it.
我们认为相对于以前的衰退，当前经济衰退的长度和深度是与它之前的家庭负债急剧升高紧密相关的。
During each iteration after the first, we create the depth view of requirements by doing deep dives into specific functional areas (use cases), thus building an SRS for each iteration.
在第一次迭代后的每一次中，我们通过深入钻研具体功能领域(用例)来创建需求的深度视角，因而为每个迭代建立一个SRS。
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