the scout gives a signal... 侦查员发出信♥号♥♥

169. Like a well-drilled Roman legion...
     就像一个训练有素的罗马军团
170. a thousand soldiers march to war.
     一千士兵向战场进军
171. When close to the termite workers,
     当靠近白蚁工蚁时
172. the scout gives a signal...
     侦查员发出信♥号♥♥
173. and the column starts to fan out,
     列队开始展开
174. becoming a wave poised to break.
     形成一个即将爆发的巨浪
175. Now, at full force,
     现在侦查员下达最后命令

来自《我们星球上的生命 第一季 第五集 Life on Our Planet S01E05 巨兽阴影下》第 172 行