• 1. large depth of focus: 大焦深
• 2. large depth-of-focus imaging system: 大焦深成像系统

• 1.Portrait mode chooses a large aperture (a small 'f' number) which will make the depth of field (the amount of your shot in focus) smaller.
  人像模式用一个大光圈(f值小)，而让景深(清晰对焦的那部分)变小。
  dict.yoduao.com

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