reciprocal sight line 对向照准线
zero sight line 零瞄准线
interference of sight line 视线干扰
sight line design 视线设计
sight line velocity [天] 视向速度
line-of-sight propagation [电视] 视线传播 ; 视距传播 ; 直线传播
line of sight [光] [生理] 视线 ; 瞄准线 ; 视距 ; 可视通路
以上来源于: WordNet
N an uninterrupted line of vision, as in a theatre, etc, or from a vehicle joining a road 视线
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