You need the patience af a saint for this job.

做这种工作，你得有非常人般的耐性。

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Second, this paper proposes a new decision tree algorithm, AF algorithm, which avoids multivalue bios.

提出了一种避免了多值偏向问题的决策树算法——AF算法；

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Traditionally, phase detection in DSLRs has been conducted by a dedicated AF sensor.

传统上，数码单反相机使用一个单独的对焦感应器进行相位侦测。

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To support the ample sensitivity of the new camera's sensor, the EOS 6D camera's Auto Focus (AF) system includes a newly-developed 11-point AF sensor featuring a high-precision center cross-type point with an exceptional EV -3 sensitivity rating for accurate focusing even in extremely low-light conditions.

ENGADGET: Canon unveils EOS 6D DSLR: full frame sensor and WiFi for $2,099 in December

This AF array is well suited to a wide variety of shooting styles and disciplines, offering AF modes to let users select a single point, continuous AF, Dynamic AF or use 3D tracking to keep pace with a moving subject throughout the frame.

ENGADGET: Nikon unveils lightweight, full-frame D600 DSLR -- hands-on and low-light samples (video)

For precise AF performance in a wide variety of shooting conditions, the D600 features a 39 point AF system with the new MultiCAM 4800FX AF module.

ENGADGET: Nikon unveils lightweight, full-frame D600 DSLR -- hands-on and low-light samples (video)