on sight

汉语翻译

例句：

1. The sentry was ordered to shoot on sight.
   哨兵奉命一发现目标就射击。
2. The guard had orders to shoot on sight.
   哨兵奉命见人就开枪。
3. The sentry had orders to shoot on sight.
   哨兵奉命一发现有动静就立即开枪。