名词
中文翻译：Unknown
同义词：
['main', 'chief', 'primary']
例句：
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1. The camera is positioned at the top of the building to capture the primary line of sight.
相机位于建筑物顶部，以捕捉主要视线。
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2. The team leader made sure everyone had a primary line of sight on the target.
团队领导确保每个人都能清楚地看到目标。
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3. The pilot adjusted the camera angle to get a clear primary line of sight.
飞行员调整了相机角度，以便获得清晰的主要视线。