English (Source)
Traps always attack invaders above the trap itself, but the area of influence works just like tower range for all other purposes (building occupation, module triggers, and so on).
Chinese Translation
陷阱始终会攻击位于陷阱上方的入侵者，但影响范围在其他所有用途上与防御塔射程完全一致（占用建筑格、模块触发等）。