sea-floor trench

例句：

1. 1. The sea-floor trench is a natural feature that has been studied for its geological significance.
   海底沟渠是一个自然特征，其地质意义已经得到研究。
2. 2. The deep sea-floor trench holds the largest concentration of hydrothermal vents in the world.
   深海沟渠拥有世界上最大的热液喷口集中区。
3. 3. The exploration team discovered a new species living in the sea-floor trench.
   探索队在海底沟渠发现了一种新的物种。