名词
中文翻译：无视线
同义词：
['off-line', 'non-visual', 'unseen']
例句：
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1. The camera was set up so that the subject's non line of sight was blocked.
相机被设置好，使得主体的无视线被遮挡。
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2. The scientist had to adjust his equipment to ensure that there was no non line of sight between him and thetarget.
科学家不得不调整他的设备，以确保他与目标之间没有无视线。
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3. The pilot made a quick decision to avoid any potential non line of sight with the enemy aircraft.
飞行员迅速决定避免与敌方飞机的潜在无视线接触。