以下为句子列表：
英文: Therefore, these canines must stand far apart and be of good length so that the front surface of the muzzle is broad and squarish and, when viewed from the side, shows moderate layback.
中文: 所以下犬齿必须有足够的长度，而且彼此间有足够的距离，以形成口吻前部的曲面，从侧面观察显得有点方、有点宽、还有点向后。
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