labyrinth flameproof joint

例句：

1. 1. The labyrinth of tunnels is a challenge for the explorers.
   隧道的迷宫对探险者来说是一大挑战。
2. 2. The labyrinth of clues led them to the treasure.
   线索的迷宫引导他们找到了宝藏。
3. 3. The labyrinth of roads and buildings made it difficult to navigate.
   道路和建筑的迷宫使得导航变得困难。