How much of the subject really needs a sharp focus?
主体有多少部分需要合焦？
The two rivals also a sharp focus on the board, look!
而二位对手也是全神贯注地盯着棋盘，瞧！
Maintaining a sharp focus on the eyes is imperative, otherwise the image will fail.
一定要把焦点对准眼睛，否则照片就会失败。
If your subject is not in the center of the picture, you need to lock the focus to create a sharp picture.
假若你的拍摄对象不是在照片中央，你就需要锁定焦点已获得清晰的相片。
Bring the object into focus if you want a sharp photograph.
要照出清晰的照片，就要把焦点对准物体。
Bring a star or an artificial star to sharp focus.
找一颗星，或者制造一个人造星点，要比较尖锐的。
Bring a star or an artificial star to sharp focus.
找一颗星，或者制造一个人造星点，要比较尖锐的。
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