零视差取决于从左侧画面的左边沿到右侧画面的右边沿的裁切列。
The zero parallax is controlled by trimming columns the left of the left image and off the right of the right image, this is described here.
下列范例会以前置字元零格式化数个数值，让格式化数值在小数点左边的总长度至少为八个字元。
The following example formats several numeric values with leading zeros so that the total length of the formatted number is at least eight digits to the left of the decimal.
用零填充右移后左边空出的位。
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