through vibrations in the sand. 感知到蝙蝠的靠近

291. both predator and prey are effectively blind,
     猎食者和猎物都丧失了视力
292. but the scorpion has one advantage...
     但是蝎子有一项优势
293. he can sense the approach of the bat
     他能够通过沙子的振动
294. through vibrations in the sand.
     感知到蝙蝠的靠近
295. Otonycteris must rely entirely on its hearing.
     尖耳蝠则要完全依靠自己的听觉
296. If the scorpion doesn't move, it won't know it's there.
     如果蝎子不动 它就无法感知其位置
297. The battle is on.
     战斗打响了

来自《行星地球 第二季 第四集 Planet Earth S02E04 沙漠》第 294 行