When tracing this line of sight, the first corner counts as one only edge.

当描绘视线时，起始的角视为只接触一个边。

youdao

The first use of the hybrid electric drive technology will be in the Non-Line-of-Sight Cannon (NLOS-C) -- the lead FCS ground combat vehicle slated to begin initial production in 2008.

间瞄加农炮（NLOS-C）将首先采用混合电力驱动技术，并将在2008年开始最初的生产。

youdao

By some strange reflex that I had previously never used, I picked up the line - my first and last sight of the ball, I might add - and opted to leave it well alone.

BBC: Facing England's tormentor